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Спектроскопия комбинационного рассеяния и электронных возбуждений структурно неупорядоченного кристалла FeTiF6∙6H2O / Ю. В. Герасимова, А. С. Александровский, Н. М. Лапташ [и др.] // 7-й Урало-сибирский семинар "Спектроскопия комбинационного рассеяния света" : материалы семинара / прогр. ком. В. Ф. Шабанов, прогр. ком. А. Н. Втюрин, прогр. ком., ред. А. С. Крылов, орг. ком. С. Н. Крылова и др. - 2021. - секция 2: Комбинационное рассеяние в кристаллах. - С. 35-36. - Библиогр.: 2. - Работа выполнена при финансовой поддержке Российского фонда фундаментальных исследований, Правительства Красноярского края и Красноярского краевого фонда науки в рамках исследовательского проекта № 20-42-240014 . - ISBN 978-5-94332-125-2

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Шабанов, Василий Филиппович \прогр. ком.\; Shabanov, V. F.; Втюрин, Александр Николаевич \прогр. ком.\; Vtyurin, A. N.; Крылов, Александр Сергеевич \прогр. ком., ред.\; Krylov, A. S.; Крылова, Светлана Николаевна \орг. ком.\; Krylova, S. N.; Герасимова, Юлия Валентиновна; Gerasimova, J. V.; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Лапташ, Н. М.; Герасимов, М. А.; Крылов, Александр Сергеевич; Втюрин, Александр Николаевич; "Спектроскопия комбинационного рассеяния света", Урало-сибирский семинар(7 ; 2021 ; 23-25 авг. ; Екатеринбург); Урало-сибирский семинар по спектроскопии комбинационного рассеяния света(7 ; 2021 ; 23-25 авг. ; Екатеринбург); Научный совет по физике конденсированных сред РАН; Научный совет по спектроскопии атомов и молекул РАН; Российское минералогическое общество. Комиссия по рентгенографии, кристаллохимии и спектроскопии; Институт геологии и геохимии им. академика А. Н. Заварицкого УрО РАН; Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук"; Институт физики им. Л.В. Киренского Сибирского отделения РАН; Институт химии твердого тела УрО РАН; Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина
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    Crystal structure, vibrational, spectroscopic and thermochemical properties of double sulfate crystalline hydrate [CsEu(H2O)3(SO4)2]·H2O and its thermal dehydration product CsEu(SO4)2 / Y. G. Denisenko, M. S. Molokeev, A. S. Oreshonkov [et al.] // Crystals. - 2021. - Vol. 11, Is. 9. - Ст. 1027, DOI 10.3390/cryst11091027. - Cited References: 103. - This work was partially supported by the Russian Foundation for Basic Research (grant 19-33-90258\19) . - ISSN 2073-4352
   Перевод заглавия: Кристаллическая структура, колебательные, спектроскопические и термохимические свойства двойного сульфатного кристаллического гидрата [CsEu(H2O)3(SO4)2]·H2O и продукта его термической дегидратации CsEu(SO4)2
Кл.слова (ненормированные):
sulfate -- dehydration -- crystal structure -- Raman -- thermal stability -- photoluminescence
Аннотация: Crystalline hydrate of double cesium europium sulfate [CsEu(H2O)3(SO4)2]·H2O was synthesized by the crystallization from an aqueous solution containing equimolar amounts of 1Cs+:1Eu3+:2SO42− ions. Anhydrous salt CsEu(SO4)2 was formed as a result of the thermal dehydration of the crystallohydrate. The unusual effects observed during the thermal dehydration were attributed to the specific coordination of water molecules in the [CsEu(H2O)3(SO4)2]·H2O structure. The crystal structure of [CsEu(H2O)3(SO4)2]·H2O was determined by a single crystal X-ray diffraction analysis, and the crystal structure of CsEu(SO4)2 was obtained by the Rietveld method. [CsEu(H2O)3(SO4)2]·H2O crystallizes in the monoclinic system, space group P21/c (a = 6.5574(1) Å, b = 19.0733(3) Å, c = 8.8364(2) Å, β = 93.931(1)°, V = 1102.58(3) Å3). The anhydrous sulfate CsEu(SO4)2 formed as a result of the thermal destruction crystallizes in the monoclinic system, space group C2/c (a = 14.327(1) Å, b = 5.3838(4) Å, c = 9.5104(6) Å, β = 101.979(3) °, V = 717.58(9) Å3). The vibration properties of the compounds are fully consistent with the structural models and are mainly determined by the deformation of non-rigid structural elements, such as H2O and SO42−. As shown by the diffused reflection spectra measurements and DFT calculations, the structural transformation from [CsEu(H2O)3(SO4)2]·H2O to CsEu(SO4)2 induced a significant band gap reduction. A noticeable difference of the luminescence spectra between cesium europium sulfate and cesium europium sulfate hydrate is detected and explained by the variation of the extent of local symmetry violation at the crystallographic sites occupied by Eu3+ ions, namely, by the increase in inversion asymmetry in [CsEu(H2O)3(SO4)2]·H2O and the increase in mirror asymmetry in CsEu(SO4)2. The chemical shift of the 5D0 energy level in cesium europium sulfate hydrate, with respect to cesium europium sulfate, is associated with the presence of H2O molecules in the vicinity of Eu3+ ion.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Laboratory of Crystal Physics, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radioelectronic, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Molecular Spectroscopy, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Coherent Optics, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Chemistry of Compounds of Rare-Earth Elements, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Azarapin, N. O.; Andreev, O. V.; Razumkova, I. A.; Atuchin, V. V.
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Spectroscopy of structurally disordered hydrated iron fluoridotitanate in the regions of vibrational and electronic excitations / Y. V. Gerasimova, A. S. Aleksandrovsky, N. M. Laptash [et al.] // Spectrochim. Acta A. - 2022. - Vol. 264. - Ст. 120244, DOI 10.1016/j.saa.2021.120244. - Cited References: 28. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and Krasnoyarsk Regional Foundation of Science according to the research project “Spectral and magnetic properties of single crystals of transition metal fluoride hexahydrates.” No. 20-42-240014 . - ISSN 1386-1425
Кл.слова (ненормированные):
Hydrated iron fluoridotitanate -- Phase transition -- Order-disorder -- Raman -- Dynamics -- Electronic excitations
Аннотация: Raman and optical absorption spectra of disordered hydrated iron fluoridotitanate (HITF) single crystal were studied. Temperature transformations of the Raman spectra indicate independent ordering processes of the [TiF6]2− and [Fe(H2O)6]2+ complexes below the structural phase transition. The absorption spectrum in the near-infrared and visible ranges includes transitions from the high spin ground state 5T2 of Fe2+ ion to the excited 5E state and a set of excited triplets. Analysis by Tanabe-Sugano method gives crystal field Dq = 490 cm−1 and Racah parameters B = 340 cm−1 and C = 1904 cm−1. Considerable decrease of B parameter as compared to the free ion value indicates a decrease of interelectron repulsion in the disordered neighborhood of Fe2+ ions.

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Kirensky Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Institute of Chemistry, Far Eastern Branch of RAS, Vladivostok, 690022, Russian Federation

Доп.точки доступа:
Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Laptash, N. M.; Gerasimov, M. A.; Герасимов, М. А.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович
}
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    Exploration of the structural, spectroscopic and thermal properties of double sulfate monohydrate NaSm(SO4)2·H2O and its thermal decomposition product NaSm(SO4)2 / Y. G. Denisenko, A. E. Sedykh, S. A. Basova [et al.] // Adv. Powder Technol. - 2021. - Vol. 32, Is. 11. - P. 3943-3953, DOI 10.1016/j.apt.2021.08.009. - Cited References: 81. - This work was partly supported by the Russian Science Foundation (21-19-00046) and Russian Foundation for Basic Research (Grant 19-33-90258\19). The use of the equipment of Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged . - ISSN 0921-8831
   Перевод заглавия: Исследование структурных, спектроскопических и термических свойств двойного сульфатного моногидрата NaSm(SO4)2·H2O и продукта его термического разложения NaSm(SO4)2
Кл.слова (ненормированные):
Sulfate -- Thermal decomposition -- Crystal structure -- Raman -- Photoluminescence
Аннотация: Samarium-sodium double sulfate crystalline hydrate NaSm(SO4)2·H2O was obtained by the crystallization from an aqueous solution containing equimolar amounts of ions. The anhydrous salt of NaSm(SO4)2 was formed by a thermally induced release of the equivalent of water from NaSm(SO4)2·H2O. The kinetic parameters of thermal decomposition were determined (Ea = 102 kJ/mol, A = 9·106). The crystal structures of both compounds were refined from the X-ray powder diffraction data. Sulfate hydrate NaSm(SO4)2·H2O crystallizes in the trigonal symmetry, space group P3121 (a = 6.91820(3) and c = 12.8100(1) Å, V = 530.963(7) Å3). The anhydrous salt crystallizes in the triclinic symmetry, space group P-1 (a = 6.8816(2), b = 6.2968(2) and c = 7.0607(2) Å, α = 96.035(1), β = 99.191(1) and γ = 90.986(1)°, V = 300.17(1) Å3). The vibrational properties of compounds are mainly determined by the sulfate group deformations. The luminescence spectra of both sulfates are similar and are governed by the transitions of samarium ions 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2 and 11/2). The anhydrous sulfate is stable up to 1100 K and undergoes an almost isotropic expansion when heated. After 1100 K, the compound decomposes into Sm2(SO4)3 and Na2SO4.

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Держатели документа:
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far-Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Research Department, Northern Trans-Ural State Agricultural University, Tyumen, 625003, Russian Federation
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation
Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, Giessen, 35392, Germany

Доп.точки доступа:
Denisenko, Y. G.; Sedykh, A. E.; Basova, S. A.; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Khritokhin, N. A.; Sal'nikova, E. I.; Andreev, O. V.; Muller-Buschbaum, K.
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Scheelite type microcrystalline AgGd(MoO4)2:Yb3+/Ho3+ upconversion yellow phosphors by MES based synthesis and their spectroscopic properties for biomedical applications / Chang Sung LimWon-Chun Oh, A. S. Aleksandrovsky [et al.] // The 15th International conference on multifunctional materials and application. - 2021. - Ст. PO8. - P. 75-76. - Cited References: 4

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Доп.точки доступа:
Chang Sung Lim; Won-Chun Oh; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; International Conference on Multifunctional Materials and Application(15 ; 2021 ; Nov. 25-25 ; Nakhon Si Thammarat Rajabhat University, Thailand)
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    Structural and spectroscopic effects of Li+ substitution for Na+ in LixNa1-xCaGd0.5Ho0.05Yb0.45(MoO4)3 scheelite-type upconversion phosphors / C.-S. Lim, A. S. Aleksandrovsky, M. S. Molokeev [et al.] // Molecules. - 2021. - Vol. 26, Is. 23. - Ст. 7357, DOI 10.3390/molecules26237357. - Cited References: 77. - This study was supported by the Research Program through the Campus Research Foundation funded by Hanseo University in 2021 (211Yunghap06) . - ISSN 1420-3049
   Перевод заглавия: Структурные и спектральные эффекты замещения Na+ ионами Li+ в LixNa1-xCaGd0.5Ho0.05Yb0.45(MoO4)3 шеелитоподобном апконверсионном люминофоре
Кл.слова (ненормированные):
optical materials -- chemical synthesis -- molybdate -- Raman spectroscopy -- X-ray diffraction; phosphors -- phosphors
Аннотация: A set of new triple molybdates, LixNa1-xCaGd0.5(MoO4)3:Ho3+0.05/Yb3+0.45, was successfully manufactured by the microwave-accompanied sol–gel-based process (MAS). Yellow molybdate phosphors LixNa1-xCaGd0.5(MoO4)3:Ho3+0.05/Yb3+0.45 with variation of the LixNa1-x (x = 0, 0.05, 0.1, 0.2, 0.3) ratio under constant doping amounts of Ho3+ = 0.05 and Yb3+ = 0.45 were obtained, and the effect of Li+ on their spectroscopic features was investigated. The crystal structures of LixNa1-xCaGd0.5(MoO4)3:Ho3+0.05/Yb3+0.45 (x = 0, 0.05, 0.1, 0.2, 0.3) at room temperature were determined in space group I41/a by Rietveld analysis. Pure NaCaGd0.5Ho0.05Yb0.45(MoO4)3 has a scheelite-type structure with cell parameters a = 5.2077 (2) and c = 11.3657 (5) Å, V = 308.24 (3) Å3, Z = 4. In Li-doped samples, big cation sites are occupied by a mixture of (Li,Na,Gd,Ho,Yb) ions, and this provides a linear cell volume decrease with increasing Li doping level. The evaluated upconversion (UC) behavior and Raman spectroscopic results of the phosphors are discussed in detail. Under excitation at 980 nm, the phosphors provide yellow color emission based on the 5S2/5F4 → 5I8 green emission and the 5F5 → 5I8 red emission. The incorporated Li+ ions gave rise to local symmetry distortion (LSD) around the cations in the substituted crystalline structure by the Ho3+ and Yb3+ ions, and they further affected the UC transition probabilities in triple molybdates LixNa1-xCaGd0.5(MoO4)3:Ho3+0.05/Yb3+0.45. The complex UC intensity dependence on the Li content is explained by the specificity of unit cell distortion in a disordered large ion system within the scheelite crystal structure. The Raman spectra of LixNa1-xCaGd0.5(MoO4)3 doped with Ho3+ and Yb3+ ions were totally superimposed with the luminescence signal of Ho3+ ions in the range of Mo–O stretching vibrations, and increasing the Li+ content resulted in a change in the Ho3+ multiplet intensity. The individual chromaticity points (ICP) for the LiNaCaGd(MoO4)3:Ho3+,Yb3+ phosphors correspond to the equal-energy point in the standard CIE (Commission Internationale de L’Eclairage) coordinates.

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Держатели документа:
Department of Aerospace Advanced Materials and Chemical Engineering, Hanseo University, Seosan 31962, Korea
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660041 Krasnoyarsk, Russia
Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
School of Engineering and Construction, Siberian Federal University, 660041 Krasnoyarsk, Russia
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, 630090 Novosibirsk, Russia
Research and Development Department, Kemerovo State University, 650000 Kemerovo, Russia
Department of Industrial Machinery Design, Novosibirsk State Technical University, 630073 Novosibirsk, Russia

Доп.точки доступа:
Lim, Chang-Sung; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Atuchin, V. V.
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    Синтез и фотоэлектрокаталитическая активность анодных наноструктурированных TiO2 пленок / Н. А. Зосько, Т. А. Кенова, А. С. Александровский [и др.] // Журн. СФУ. Химия. - 2021. - Т. 14, № 3. - С. 396-405 ; J. Sib. Fed. Univ. Chem., DOI 10.17516/1998-2836-0249. - Библиогр.: 25. - Работа выполнена в рамках государственного задания ФИЦ КНЦ СО РАН (проект 0287-2021-0023) с использованием оборудования Красноярского регионального центра коллективного пользования ФИЦ КНЦ СО РАН. Авторы выражают признательность Н. Г. Максимову за снятие диффузных спектров отражения и В. Ф. Шабанову за плодотворную дискуссию . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: Synthesis and Photoelectrocatalytic Activity of Anodic Nanostructured TiO2 Films
Кл.слова (ненормированные):
фотоэлектрокаталитическая активность -- TiO2 нанотрубки -- анодное окисление -- морфология поверхности -- катодное осаждение -- Cu2O -- photoelectrocatalytic activity -- TiO2 nanotubes -- anodic oxidation -- structure morphology -- electrodeposition -- Cu2O
Аннотация: Методом электрохимического окисления получены наноструктурированные пленки диоксида титана, исследовано влияние напряжения анодирования на морфологию поверхности, оптические и фотоэлектрокаталитические характеристики полученных нанотрубок. Показано, что напряжение анодирования оказывает существенное влияние на структуру нанопленок и, соответственно, на их фотоэлектрокаталитическую активность. Методом катодного осаждения Cu2O на анодированный TiO2 получен фотоанод с гетеропереходом. Установлено, что фотоэлектроактивность такого анода при потенциале 1В (отн. Ag/AgCl/3,5MKCl) на 15% выше, чем активность исходной наноструктурированной TiO2 пленки.
Nanostructured titanium dioxide films were prepared by electrochemical oxidation technique, anodization voltage effect on structure morphology, optical and photoelectrocatalytic performances of the nanotubes were studied. The anodization voltage is shown to significantly affect structure of nanofilms and, accordingly, their photoelectrocatalytic activity. An active heterojunction photoanode was synthesised with electrode position of Cu2O onanodized TiO2. The anode photoelectroact ivity under bias 1V (Ag/AgCl/3,5M KCl) is found to be 15 % higher than that of the original nanostructured TiO2 film.

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Институт химии и химической технологии ФИЦ КНЦ СО РАН, Российская Федерация, Красноярск
Институт физики им. Л. В. Киренского ФИЦ КНЦ СО РАН, Российская Федерация, Красноярск
Сибирский федеральный университет, Российская Федерация, Красноярск

Доп.точки доступа:
Зосько, Н. А.; Кенова, Т. А.; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Жижаев, А. М.; Таран, О. П.; [02872021-0023]

}
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Синтез, кристаллическая структура, оптические и термодинамические свойства PrAlGe2O7 / Л. А. Иртюго, Л. Т. Денисова, М. С. Молокеев [и др.] // Журн. физ. химии. - 2021. - Т. 95, № 8. - С. 1165-1170, DOI 10.31857/S0044453721080124. - Библиогр.: 23 . - ISSN 0044-4537
Кл.слова (ненормированные):
сложные оксидные соединения -- твердофазный синтез -- кристаллическая структура -- люминесценция -- теплоемкость -- термодинамические свойства
Аннотация: Из исходных оксидов Pr2O3, Al2O3 и GeO2 твердофазным методом синтезирован германат PrAlGe2O7. С использованием рентгеновской дифракции уточнена его кристаллическая структура. Спектры люминесценции измерены при комнатной температуре. Влияние температуры на его теплоемкость определено методом дифференциальной сканирующей калориметрии. По экспериментальным данным Cp = f(T) в области 350–1000 K рассчитаны термодинамические свойства оксидного соединения.

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РИНЦ

Переводная версия Synthesis, crystal structure, and the optical and thermodynamic properties of PrAlGe2O7 [Текст] / L. A. Irtyugo, L. T. Denisova, M. S. Molokeev [et al.] // Russ. J. Phys. Chem. A. - 2021. - Vol. 95 Is. 8.- P.1546-1550

Держатели документа:
Сибирский федеральный университет, Красноярск, Россия
Российская академия наук, Сибирское отделение, Институт физики им. Л.В. Киренского, Красноярск, Россия

Доп.точки доступа:
Иртюго, Л. А.; Денисова, Л. Т.; Молокеев, Максим Сергеевич; Molokeev, M. S.; Денисов, В. М.; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Белецкий, В. В.; Сивкова, Е. Ю.
}
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    Luminescent zero-dimensional hybrid lead thiohalide nanostructures for high quantum yield and broadband excitation / N. N. Golovnev, A. S. Aleksandrovsky, M. A. Gerasimova [et al.] // ACS Appl. Nano Mat. - 2021. - Vol. 4, Is. 4. - P. 3654-3663, DOI 10.1021/acsanm.1c00162. - Cited References: 55. - This work is supported by the RFBR according to the research project No. 19-52-80003. This work is also supported by the National Natural Science Foundation of China (51961145101). V.M. thanks Russian Foundation for Basic Research (project number 19-03-00043) for funding. The use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged. The authors thank JSCC RAS for providing computational resources . - ISSN 2574-0970
   Перевод заглавия: Наноструктуры люминесцентных нульразмерных гибридных тиогалогенов свинца для высокого квантового выхода и широкополосного спектра возбуждения
Кл.слова (ненормированные):
Zero-dimensional hybrid metal halide -- Luminescence -- Quantum yield -- Mechanochemical synthesis -- X-ray diffraction -- Dimethylthiourea
Аннотация: Luminescent trans-[Pb(DMTU-S)4Cl2] (DMTU: N,N′-dimethylthiourea) was designed and prepared via either mechanochemical or solvothermal methods, and the structures of DMTU and trans-[Pb(DMTU-S)4Cl2] have been resolved using X-ray single-crystal diffraction. Upon excitation over broadband covering the range from 450 to 250 nm, trans-[Pb(DMTU-S)4Cl2] shows yellow-green emission peaking at 549 nm with a spectral width of 110 nm, which is assigned to the triplet–singlet transition of Pb2+ ions within distorted heterogeneous S4Cl2 octahedra. The broadband excitation comprised singlet–singlet transitions of Pb2+ ions and energy transfer from orbitals involving those of organic ligands. Simultaneous analysis of the luminescent bandwidth and Stokes shift gives for Pb2+ ions in S4Cl2 octahedra the value of the Huang–Rhys parameter S = 4.25 and the energy of phonon involved in the formation of the luminescence spectrum of the order of 90 meV. Quantum yield as high as 91% is detected for excitation at 365 nm. This high quantum yield indicates the absence of noticeable concentration quenching at an average distance of 9.4 Å between the Pb2+ ions within the structure of trans-[Pb(DMTU)4Cl2]. The weak spin–orbit intersystem crossing is deduced from a high photoluminescence quantum yield (PLQY) value. Time dependent-density functional theory (TD-DFT) calculations of the nanocluster indicate the red shift of absorption bands in Pb(DMTU)4Cl2 with respect to parent DMTU. The high-performance photoluminescence and stability demonstrated promising applications in photonics.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center, KSC, SB, RAS, Krasnoyarsk, 660036, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Gerasimova, M. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Mironov, V. A.; Demina, A. V.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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10.

    Synthesis, structure, melting and optical properties of three complex orthorhombic sulfides BaDyCuS3, BaHoCuS3 and BaYbCuS3 / N. O. Azarapin, V. V. Atuchin, N. G. Maximov [et al.] // Mater. Res. Bull. - 2021. - Vol. 140. - Ст. 111314, DOI 10.1016/j.materresbull.2021.111314. - Cited References: 60. - This study was supported by the Russian Science Foundation (19-42-02003). The authors would like to thank Alexey A. Lubin for his studies on SEM. The studies were carried out on the basis of laboratory of electron and probe microscopy in REC ‘Nanotechnologies’. This work was partially supported by the DST-RSF project under the India-Russia Programme of Cooperation in Science and Technology (No. DST/ INT/RUS/RSF/P-20 dated May 16, 2019). Shaibal Mukherjee would like to thank MeitY for the YFRF under the Visvesvaraya Ph.D. Scheme for Electronics and IT. This publication is an outcome of the R&D work undertaken in the project under the Visvesvaraya Ph.D. Scheme of MeitY being implemented by Digital India Corporation (formerly Media Lab Asia). We are grateful to the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center «Krasnoyarsk Science Center SB RAS» for the provided equipment . - ISSN 0025-5408
   Перевод заглавия: Синтез, строение, плавление и оптические свойства трех сложных орторомбических сульфидов BaDyCuS3, BaHoCuS3 и BaYbCuS3
Кл.слова (ненормированные):
Complex sulfides -- Crystal structure -- SEM -- Raman -- Melting point
Аннотация: Complex sulfides BaDyCuS3, BaHoCuS3 and BaYbCuS3 were synthesized in a flow of sulfiding gases (CS2, H2S) at 900°C from standard solutions of lanthanide and copper nitrates, as well as from the same standard Ba(OH)2 solution. The crystal structures of BaDyCuS3, BaHoCuS3 and BaYbCuS3 were obtained by the Rietveld refinement method. All three compounds crystallize in the Cmcm space group (KZrCuS3 structural type) as predicted by the tolerance factor analysis. Their micromorphological, thermal and spectroscopic properties are evaluated. BaDyCuS3 and BaHoCuS3 melt congruently at 1376.5 °C and 1363.8 °C. BaYbCuS3 melts incongruently at 1353.3 °C. The optical band gap is 2.45 eV for BaDyCuS3, 2.37 eV for BaHoCuS3 and 1.82 eV for BaYbCuS3. The low bandgap of BaYbCuS3 is explained by the charge transfer band of Yb at the bottom of conduction band. The vibrational parameters of BaDyCuS3, BaHoCuS3 and BaYbCuS3 crystals were determined with the use of Raman and Infrared spectroscopies.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660049, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Hybrid Nanodevice Research Group (HNRG), Electrical Engineering and Centre for Advanced Electronics (CAE), Indian Institute of Technology IndoreMadhya Pradesh 453552, India
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation

Доп.точки доступа:
Azarapin, N. O.; Atuchin, V. V.; Maximov, N. G.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Krylov, A. S.; Крылов, Александр Сергеевич; Burkhanova, T. M.; Mukherjee, S.; Andreev, O. V.
}
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11.

Synthesis, structure and photoluminescent properties of Eu:Gd2O3 nanophosphor synthesized by cw CO2 laser vaporization / A. I. Kostyukov, V. N. Snytnikov, V. N. Snytnikov [et al.] // J. Lumines. - 2021. - Vol. 235. - Ст. 118050, DOI 10.1016/j.jlumin.2021.118050. - Cited References: 42. - The TEM studies are conducted using the equipment of the Center of Collective Use « National Center of Catalyst Research». This work is financially supported by the Russian Foundation for Basic Research (RFBR), Project no. 19-32-60027 . - ISSN 0022-2313
Кл.слова (ненормированные):
Photoluminescence -- Eu3+ ions -- Monoclinic Gd2O3 -- Nanophosphors -- Laser vaporization
Аннотация: Europium doped Gd2O3 sphere-like nanoparticles with dm = 9.3 ± 3.5 nm were synthesized by cw CO2 laser vaporization technique in a flowing mixture of argon and oxygen. According to XRD data, the Eu:Gd2O3 nanoparticles crystallize in the monoclinic symmetry class (C2/m space group). High-resolution luminescence spectroscopy study showed that the ultra-narrow 5D0 → 7F0 transition of Eu3+ demonstrates only two peaks corresponding to two inequivalent Cs positions of Eu3+ ion in monoclinic Gd2O3 lattice that is explained by the peculiarities of local environment of Eu3+ ion at these sites. The hypersensitive transition 5D0 → 7F2 dominates in the spectrum and is expanded to the red part of the spectrum in comparison with cubic Eu:Gd2O3 due to intense transitions terminating at higher-lying components of the crystal-field-split 7F2 state. In the luminescence spectrum, an additional weak band with the maximum at 407 nm corresponding to the electronic transitions 4f65 d1(7FJ) → 4f7(8S7/2) of Eu2+ was detected. The obtained values of chromaticity coordinates and absolute quantum yield are (0.644; 0.325) and ca. 1%, respectively. The phase transformations have been investigated using differential scanning calorimetry and thermogravimetry (50–1400 °C). After annealing in air at 700 °C, the monoclinic symmetry class of the Eu:Gd2O3 nanoparticles is preserved and the particle size increases to dm = 17.8 ± 6.1 nm. After annealing, the chromaticity coordinates (0.659; 0.334) and absolute quantum yield (ca. 4%) can be obtained using red phosphor based on monoclinic Gd2O3:Eu3+. The lifetime of the excited 5D0 state of Eu3+ in the annealed nanoparticles is longer than that in the as-synthesized nanoparticles, due to the suppression of nonradiative decay after annealing.

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Держатели документа:
Novosibirsk State University, Pirogova Str. 2, Novosibirsk, 630090, Russian Federation
Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, Novosibirsk, 630090, Russian Federation
Nikolaev Institute of Inorganic Chemistry SB RAS, Akad. Lavrentiev Ave. 3, Novosibirsk, 630090, Russian Federation
Institute of Laser Physics SB RAS, Lavrentyev Ave. 15b, Novosibirsk, 630090, Russian Federation
Novosibirsk State Technical University, K. Marx Ave. 20, Novosibirsk, 630073, Russian Federation
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Kostyukov, A. I.; Snytnikov, V. N.; Rakhmanova, M. I.; Kostyukova, N. Y.; Ishchenko, A. V.; Cherepanova, S. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич
}
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12.

Regularities of the property changes in the compounds EuLnCuS3 (Ln = La-Lu) / A. V. Ruseikina, V. A. Chernyshev, D. A. Velikanov [et al.] // J. Alloys Compd. - 2021. - Vol. 874. - Ст. 159968, DOI 10.1016/j.jallcom.2021.159968. - Cited References: 102. - The work was supported by the Ministry of Science and Higher Education of the Russian Federation under Project No. FEUZ-2020-0054 ; by the " YMNIK " program research project No. 14977GY/2019; by the Ministry of Science and Higher Education of the Russian Federation under project RFMEFI59420X0019 . - ISSN 0925-8388
Кл.слова (ненормированные):
Inorganic materials -- Ab initio calculations -- Thermochemistry -- Magnetic measurements -- Microhardness -- Lattice dynamics
Аннотация: This work contains the results of complex experimental research of the compounds EuLnCuS3 (Ln = La-Lu) enhanced by the DFT calculations. It is aimed at the data replenishment with particular attention to the revelation of regularities in the property changes, in order to extend the potential applicability of the materials of the selected chemical class. The ab initio calculations of the fundamental vibrational modes of the crystal structures were in good agreement with experimental results. The wavenumbers and types of the modes were determined, and the degree of the ion participation in the modes was also estimated. The elastic properties of the compounds were calculated. The compounds were found out to be IR-transparent in the range of 4000–400 cm–1. The estimated microhardness of the compounds is in the range of 2.68–3.60 GPa. According to the DSC data, the reversible polymorphous transitions were manifested in the compounds EuLnCuS3 (Ln = Sm, Gd-Lu): for EuSmCuS3 Tα↔β = 1437 K, ΔНα↔β = 7.0 kJ·mol-1, Tβ↔γ = 1453 K, ΔНβ↔γ = 2.6 kJ·mol-1; for EuTbCuS3 Tα↔β = 1478 K, ΔНα↔β = 1.6 kJ·mol-1, Tβ↔γ = 1516 K, ΔНβ↔γ = 0.9 kJ·mol-1, Tγ↔δ = 1548 K, ΔНγ↔δ = 1.6 kJ·mol-1; for EuTmCuS3 Tα↔β = 1543 K, Tβ↔γ = 1593 K, Tγ↔δ = 1620 K; for EuYbCuS3 Tα↔β = 1513 K, Tβ↔γ = 1564 K, Tγ↔δ = 1594 K; for EuLuCuS3 Tα↔β = 1549 K, Tβ↔γ = 1601 K, Tγ↔δ = 1628 K. In the EuLnCuS3 series, the transition into either ferro- or ferrimagnetic states occurred in the narrow temperature range from 2 to 5 K. The tetrad effect in the changes of incongruent melting temperature and microhardness conditioned on rLn3+ as well as influencing of phenomenon of crystallochemical contraction were observed. For delimiting between space groups Cmcm and Pnma in the compounds ALnCuS3, the use of the tolerance factor t’ = IR(A)·IR(C) + a×IR(B)2 was verified.

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Держатели документа:
Institute of Chemistry, University of Tyumen, Tyumen, 625003, Russian Federation
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Institute of Physics and Technology, University of Tyumen, Tyumen, 625003, Russian Federation
Engineering Centre of Composite Materials Based on Wolfram Compounds and Rare-earth Elements, University of Tyumen, Tyumen, 625003, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660049, Russian Federation
University of Tyumen, Tyumen, 625003, Russian Federation

Доп.точки доступа:
Ruseikina, A. V.; Chernyshev, V. A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Grigoriev, M. V.; Andreev, O. V.; Garmonov, A. A.; Matigorov, A. V.; Melnikova, L. V.; Kislitsyn, A. A.; Volkova, S. S.
}
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13.

Synthesis, crystal structure, and the optical and thermodynamic properties of PrAlGe2O7 / L. A. Irtyugo, L. T. Denisova, M. S. Molokeev [et al.] // Russ. J. Phys. Chem. A. - 2021. - Vol. 95, Is. 8. - P. 1546-1550, DOI 10.1134/S0036024421080124. - Cited References: 23 . - ISSN 0036-0244. - ISSN 1531-863X

РУБ Chemistry, Physical
Рубрики:
TEMPERATURE HEAT-CAPACITY
   GERMANATES
   SMFEGE2O7
   PR
Кл.слова (ненормированные):
PrAlGe2O7 -- complex oxide compounds -- solid-state synthesis -- crystal structure -- luminescence -- heat capacity -- thermodynamic properties
Аннотация: Germanate PrAlGe2O7 is obtained from initial oxides Pr2O3, Al2O3, and GeO2 via solid-phase synthesis. The crystal structure of the investigated germanate is determined via X-ray diffraction. The luminescence spectra are been determined at room temperature. The effect temperature has on the heat capacity is determined via differential scanning calorimetry. The thermodynamic properties of the complex oxide compound are calculated using the experimental data on Cp = f(T) in the temperature range of 350‒1000 K.

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Публикация на русском языке Синтез, кристаллическая структура, оптические и термодинамические свойства PrAlGe2O7 [Текст] / Л. А. Иртюго, Л. Т. Денисова, М. С. Молокеев [и др.] // Журн. физ. химии. - 2021. - Т. 95 № 8. - С. 1165-1170

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Irtyugo, L. A.; Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Denisov, V. M.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Beletskii, V. V.; Sivkova, E. Yu
}
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14.

Evolution of structural, thermal, optical, and vibrational properties of Sc2S3, ScCuS2, and BaScCuS3 semiconductors / N. O. Azarapin, A. S. Oreshonkov, I. A. Razumkova [et al.] // Eur. J. Inorg. Chem. - 2021. - Vol. 2021, Is. 33. - P. 3355-3366, DOI 10.1002/ejic.202100292. - Cited References: 50. - The work was partially carried out using the resources of the Research Resource Center "Natural Resources Management and Physico-Chemical Research" (Tyumen University) with financial support from the Ministry of Science and Higher Education of the Russian Federation (contract No. 05.594.21.0019, UIN RFMEFI59420X0019). The Raman spectroscopic studies were carried out at the collaborative research center for vibrational spectroscopy at ISSC UB RAS (Ekaterinburg, Russia). I.I.L. would like to acknowledge the support from the Research Program No. AAAA-A19-119031890025-9 (ISSC UB RAS). The use of the equipment of Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center "Krasnoyarsk Science Center SB RAS" is acknowledged." The authors are grateful to Dr. Elena V. Vladimirova (ISSC UB RAS) for technical assistance . - ISSN 1434-1948. - ISSN 1099-0682

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
RARE-EARTH
QUATERNARY CHALCOGENIDES
CRYSTAL-STRUCTURES
Кл.слова (ненормированные):
Complex sulfides -- Density functional calculations -- DTA -- Polychalcogenides -- Rare earths
Аннотация: In the present work, we report on the synthesis of Sc2S3, ScCuS2 and BaScCuS3 powders using a method based on oxides sulfidation and modification of their properties. The crystal structures and morphology of samples are verified by XRD and SEM techniques. Thermal stability has been studied by DTA which has revealed that Sc2S3 decomposes to ScS through melting at 1877 K. ScCuS2 and BaScCuS3 melt incongruently at temperatures of 1618 K and 1535 K, respectively. The electronic structure calculations show that the investigated compounds are semiconductors with indirect band gap (Eg). According to the diffuse reflection spectroscopy, Sc2S3, ScCuS2 and BaScCuS3 are wide-bandgap semiconductors featured the Eg values of 2.53 eV, 2.05 eV and 2.06 eV, respectively. The band gap decreases with the introduction of copper (I) and barium cations into the crystal structure of the compounds. Variation of local structure has been verified by Raman and infrared spectroscopy. The calculated vibrational modes of ScCuS2 correspond to CuS4 and Sc−S layer vibrations, even though ScS6 octahedra-like structural units can be found in the structure.

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Держатели документа:
Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Engn & Construct, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC SB, Inst Chem & Chem Technol, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Ural Branch, Inst Solid State Chem, Ekaterinburg 620990, Russia.

Доп.точки доступа:
Azarapin, N. O.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Razumkova, I. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Maximov, N. G.; Leonidov, I. I.; Shestakov, N. P.; Шестаков, Николай Петрович; Andreev, O. V.; Ministry of Science and Higher Education of the Russian Federation [05.594.21.0019, UIN RFME-FI59420X0019]; ISSC UB RAS [AAAA-A19-119031890025-9]
}
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15.

Electronic band structures of NdFe3(BO3)4 and NdGa3(BO3)4 crystals: ab initio calculations / S. Krylova, I. Gudim, A. Aleksandrovsky [et al.] // Ferroelectrics. - 2021. - Vol. 575, Is. 1. - P. 11-17, DOI 10.1080/00150193.2021.1888219. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research Grant No. 20-42-240009 . - ISSN 0015-0193. - ISSN 1563-5112

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
HOFE3(BO3)4
   TEMPERATURE
   SPECTRA
   GROWTH
Кл.слова (ненормированные):
Borates -- ab initio calculation -- electronic bands -- crystal structure
Аннотация: NdFe3(BO3)4 and NdGa3(BO3)4 crystals are of great interest due to their physical properties. For example, NdFe3(BO3)4 crystal demonstrates magnetodielectric and magnetopiezoelectric effects, and NdGa3(BO3)4 crystal possesses luminescent and nonlinear optical properties. In this work, the properties of these materials are calculated by the plane-wave pseudo-potential method based on density functional theory. The structures of the crystals are optimized. The electronic structure of NdFe3(BO3)4 and NdGa3(BO3)4 are calculated.

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Держатели документа:
Kirensky Inst Phys FRC KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Gudim, I. A.; Гудим, Ирина Анатольевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research GrantRussian Foundation for Basic Research (RFBR) [20-42-240009]
}
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16.

Microwave sol-gel derived Ho3+/Yb3+ co-doped NaCaGd(MoO4)3 yellow phosphors and their upconversion photoluminescence properties for optoelectronic devices / Chang Sung LimWon-Chun Oh, A. S. Aleksandrovsky [et al.] // The 15th International conference on multifunctional materials and application. - 2021. - Ст. PO7. - P. 73-74. - Cited References: 4

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Chang Sung Lim; Won-Chun Oh; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; International Conference on Multifunctional Materials and Application(15 ; 2021 ; Nov. 25-25 ; Nakhon Si Thammarat Rajabhat University, Thailand)
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17.

Nonlinear optics of randomly structured strontium tetraborate / A. S. Aleksandrovsky, A. M. Vyunishev, A. I. Zaitsev [et al.] // CLEO/Europe-EQEC 2011 : IEEE, 2011. - P84
Аннотация: Strontium tetraborate (SBO) is attractive for nonlinear optics of short-wavelength range including VUV due to its transparency window [1]. Nonlinear coefficients of SBO are the largest among crystals transparent below 270 nm. Angular phase matching is, however, absent in SBO, and the only possibility of conversion enhancement is to employ self-organized random nonlinear photonic crystal (NPC) structures discovered in SBO. These NPC are capable of two limiting cases of phase matching, namely, nonlinear diffraction (NLD) and random quasi phase matching (RQPM). NLD allows detection of NPCs and testing their reciprocal superlattice vectors (RSV) spectra via variation of the incidence angle. NLD conversion of broadband fs pulses of modest power from Ti:S oscillator results in 1.9% efficiency, being, to our knowledge, the best result obtained for this type of phase matching. RSV spectrum is wide enough to ensure NLD tunability from 355 to 510 nm. This spectrum is not flat, but the narrowing of the generated radiation spectrum due to non-flatness is rather modest.

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Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Ikonnikov, A. A.; Иконников, Антон Андреевич; Pospelov, G. I.; Slabko, V. V.; Слабко, Виталий Васильевич; Conference on Lasers and Electro-Optics Europe(2011 ; Jun. 21-25); European Quantum Electronics Conference(12 ; 2011 ; Jun. 21-25)
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18.

Deep UV generation and fs pulses characterization using strontium tetraborate [Text] / A. S. Aleksandrovsky, A. M. Vyunishev, A. I. Zaitsev [et al.] // Nonlinear Optics and Applications V : Proceedings of the SPIE. - 2011. - P36. - (SPIE Optics + Optoelectronics)
Аннотация: The properties of NPC structures in strontium tetraborate are analyzed. Different types of NPC structures are revealed that possess different nonlinear properties, and their spectral dependences of frequency conversion efficiency are calculated and compared. Experimental study of these structures is reported for the process of doubling of the second harmonic of fs Ti:S laser. Tuning of generated radiation is obtained in the range 187.5 - 232.5 nm, with extreme insensitivity to the angular orientation of NPC. Behavior of tuning curve along investigated fundamental wave range is similar in all studied samples, but efficiency obtained depends on the type of structure. Conversion efficiency andspectral quality of generated radiation is experimentally shown to grow better when using NPC with improved structure. Prospects of VUV converter on a single NPC are discussed. NPCs of SBO are demonstrated to be useful for autocorrelation diagnostics both in random QPM geometry and in the geometry of nonlinear diffraction from virtual beam.

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Ikonnikov, A.A.; Pospelov, G.I.; Slabko, V.V.; Zhokhova, A.A.; Nonlinear Optics and Applications(2011 ; Apr. ; 19-21 ; Prague)
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19.

Nonlinear photonic crystals of strontium tetraborate [Text] / A. S. Aleksandrovsky // International Workshop "Nonlinear photonics: theory, materials, applications" (NLP-2011) : Book of Abstracts. - 2011. - P40
Аннотация: Structural, optical and nonlinear optical properties of strontium tetraborate (SBO) single crystals are summarized. SBO presently is not considered to be a ferroelectric, however, domain structures consisting of alternating oppositely poled domains, strongly resembling those present in such ferroelectrics as potassium titanyl phosphate and lithium niobate, were recently discovered in this crystal. Such geometrical properties as orientation, size, and degree of randomization, of these domain structures are described. The problem of origin of domain structures in SBO is considered, as well as the possibility of their characteristics control. From the point of view of optical properties, domain-structured samples of strontium tetraborate are classified as randomized nonlinear photonic crystals. Comparative study of nonlinear diffraction and random quasi-phase-matching of nanosecond and femtosecond laser pulses in these nonlinear photonic crystals is presented. Prospects of creation of nonlinear optical converters of laser radiation into VUV spectral region based on domain structured strontium tetraborate are discussed.

Доп.точки доступа:
Aleksandrovsky, A.S.; "Nonlinear Photonics: Theory, Materials and Applications", Int. Workshop(2011 ; St. Petersburg)
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20.

    Structure and properties of phases in the Cu2-ХSe-Sb2Se3 system. The Cu2-XSe-Sb2Se3 phase diagram / M. A. Shtykova, M. S. Molokeev, B. A. Zakharov [et al.] // J. Alloys Compd. - 2022. - Vol. 906. - Ст. 164384, DOI 10.1016/j.jallcom.2022.164384. - Cited References: 111. - The research was supported for R.S. Bubnova by the Ministry of Science and Higher Education of the Russian Federation within the scientific tasks of the Institute of Silicate chemistry (Russian Academy of Sciences) [project number 0097-2019-0013]. The equipment of Research and Education Center "Molecular design and ecologically safe technologies" (Novosibirsk State University) was used for single-crystal X-ray diffraction experiments. BAZ and EVB acknowledge support by the Ministry of Science and Higher Education, project AAAA-A21-121011390011-4 . - ISSN 0925-8388
   Перевод заглавия: Структура и свойства фаз в системе Cu2-xSe-Sb2Se3; фазовая диаграмма Cu2-xSe-Sb2Se3
Кл.слова (ненормированные):
Phase equilibria -- Phase diagram -- High-temperature X-ray diffraction -- Redlich-Kister polynomial model -- Scanning electron microscopy -- Differential scanning calorimetry
Аннотация: The phase diagram of the Cu2−XSe-Sb2Se3 system is revisited to clarify ambiguity/disagreement in previously reported data. Ternary Cu3SbSe3 and CuSbSe2 compounds were obtained. In order to confirm that the phases have been identified correctly, crystal structures were solved, and the energy band gaps measured. For the sample containing 75 mol% Sb2Se3 and 25 mol% Cu1.995Se the temperature range of the stability of the high-temperature CuSb3Se5 phase was determined for the first time. This phase is formed at 445 °С, decomposes following a peritectic reaction at 527 °С, and can be quenched. A high-temperature X-ray diffraction study of a sample containing 75 mol% Sb2Se3 and 25 mol% Cu2Se allowed us to measure the thermal expansion of the CuSbSe2 and Sb2Se3 phases present in the sample. The anisotropy of thermal expansion of CuSbSe2 is similar to that of As2S3 (orpiment); thermal expansion of Sb2Se3 is similar to that of AsS (realgar). The 6 balance equations of the invariant phase transformations involving all the ternary compounds existing in the Cu2−XSe-Sb2Se3 system were suggested for the first time. The temperature and the enthalpies of all these transformations were measured. A phase diagram of the Cu2−XSe-Sb2Se3 system was found for the first time in all the range of concentrations at temperatures from ambient to the complete melting. This diagram takes into consideration the phase equilibria that involve all the ternary compounds that are possible in this system. The liquidus of the Cu2−XSe-Sb2Se3 system was calculated according to Redlich-Kister equation; it agrees with the experimental data within 1–17 °С.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Institute of Chemistry, Tyumen State University, Volodarsky str. 6, Tyumen, 625003, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok Str. 50, Building 38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodnyj av. 79, Krasnoyarsk, 660079, Russian Federation
Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, 630090, Russian Federation
Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russian Federation
Department of Condensed Matter Physics and Nanoscale Systems, Institute of Natural Sciences and Mathematics, Ural Federal University, Mira str. 19, Yekaterinburg, 620002, Russian Federation
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, Makarov Emb., 2, St. Petersburg, 199034, Russian Federation
Department of Physical and Applied Chemistry, Institute of Natural Sciences and Mathematics, Kurgan State University, Sovetskaya str. 2, b. 4, Kurgan, 640020, Russian Federation
Laboratory of Electron and Probe Microscopy, REC “Nanotechnology”, Tyumen State University, Volodarsky str. 6, Tyumen, 625003, Russian Federation
Engineering Center of Composite Materials Based on Tungsten Compounds and Rare Earth Elements, Tyumen State University, Volodarsky str. 6, Tyumen, 625003, Russian Federation
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Pervomaiskaya str. 91, Yekaterinburg, 620990, Russian Federation

Доп.точки доступа:
Shtykova, M. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zakharov, B. A.; Selezneva, N. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Bubnova, R. S.; Kamaev, D. N.; Gubin, A. A.; Habibullayev, N. N.; Matigorov, A. V.; Boldyreva, E. V.; Andreev, O. V.
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