Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (148)

Каталог журналов библиотеки ИФ СО РАН (35)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=chemistry<.>)

Общее количество найденных документов : 509
Показаны документы с 1 по 10

1-10 11-20 21-30 31-40 41-50 51-60

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ruseikina A. V., Molokeev M. S., Chernyshev V. А., Aleksandrovsky A. S., Krylov A. S., Krylova S. N., Velikanov D. A., Grigoriev M. V., Maximov N. G., Shestakov N. P., Garmonov A. A., Matigorov A. V., Tarasov A. S., Rautskii M. V., Khritokhin N. А., Melnikova L. V., Tretyakov N. Y.
Заглавие : Synthesis, structure, and properties of EuScCuS3 and SrScCuS3
Место публикации : J. Solid State Chem. - 2021. - Vol. 296. - Ст.121926. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2020.121926
Примечания : Cited References: 72. - The work was supported by the Ministry of Science and Higher Education of the Russian Federation under Project No. FEUZ-2020-0054; by RFBR Grant 18-02-00754 ; by the “UMNIK” program research project № 14977GY/2019; by the Ministry of Science and Higher Education of the Russian Federation (contract no. 05.594.21.0019 , unique identification number RFMEFI59420X0019). Maxim S. Molokeev, Anton S. Tarasov and Mikhail V. Rautskii acknowledge additional funding from Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation. The subset research was performed in Research Resource Center “Natural Resource Management and Physico-Chemical Research.” The use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS» is acknowledged
Аннотация: The crystal structures of the first-synthesized compound EuScCuS3 and previously known SrScCuS3 are refined by Rietveld analysis of X-ray powder diffraction data. The structures are found to belong to orthorhombic crystal system, space group Cmcm, structural type KZrCuS3, with a = 3.83413(3) Å, b = 12.8625(1) Å, c = 9.72654(8) Å (SrScCuS3) and a = 3.83066(8) Å, b = 12.7721(3) Å, c = 9.7297(2) Å (EuScCuS3). The temperatures and enthalpies of incongruent melting are the following: Тm = 1524.5 К, ΔHm = 21.6 kJ•mol−1 (SrScCuS3), and Тm = 1531.6 К, ΔHm = 26.1 kJ•mol−1 (EuScCuS3). Ab initio calculations of the crystal structure and phonon spectrum of the compounds were performed. The types and wavenumbers of fundamental modes were determined and the involvement of ions participating in the IR and Raman modes was assessed. The experimental IR and Raman spectra were interpreted. EuScCuS3 manifests a ferromagnetic transition at 6.4 K. The SrScCuS3 compound is diamagnetic. The optical band gaps were found to be 1.63 eV (EuScCuS3) and 2.24 eV (SrScCuS3) from the diffuse reflectance spectra. The latter value is in good agreement with that calculated by the DFT method. The narrower band gap of EuScCuS3 is explained by the presence of 4f-5d transition in Eu2+ ion that indicates a possibility to control the band gap of the chalcogenides by the inclusion of Eu. The activation energy of crystal structure defects, being the source of additional absorption in the NIR spectral range, was found to be 0.29 eV.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shubin A. A., Kovalskii V. Y., Ruzankin S. P., Zilberberg I. L., Parmon V. N., Tomilin F. N., Avramov P. V.
Заглавие : The FeIV-O• oxyl unit as a key intermediate in water oxidation on the FeIII-hydroxide: DFT predictions
Место публикации : Int. J. Quantum Chem. - 2021. - Vol. 121, Is. 10. - Ст.e26610. - ISSN 00207608 (ISSN), DOI 10.1002/qua.26610
Примечания : Cited References: 21. - Aleksandr A. Shubin, Igor L. Zilberberg, and Valentin N. Parmon acknowledge the support of Russian Foundation for Basic Research under grant No. 15-29-01275. Viktor Yu. Kovalskii acknowledges the support of Russian Foundation for Basic Research under grant No. 18-33-00932. Calculations have been performed at the Siberian Supercomputer Centre SB RAS
Аннотация: The O-O coupling process in water oxidation on the gamma FeOOH hydroxide catalyst is simulated by means of density functional theory using model iron cubane cluster Fe4O4(OH)4. A key reactive intermediate is proposed to be the HO-FeIV-O• oxyl unit with terminal oxo radical. The “initial” vertex FeIII(OH) moiety forms this intermediate at the calculated overpotential of 0.93 V by adding one water molecule and withdrawing two proton–electron pairs. The O-O coupling goes via water nucleophilic attack on the oxyl oxygen to form the O-O bond with a remarkably low barrier of 11 kcal/mol. This process is far more effective than alternative scenario based on direct interaction of two ferryl FeIV-O sites (with estimated barrier of 36 kcal/mol) and is comparable with the coupling between terminal oxo center and three-coordinated lattice oxo center (12 kcal/mol barrier). The process of hydroxylation of terminal oxygen inhibits the O-O coupling. Nevertheless, being more effective for ferryl oxygen, the hydroxylation in fact enhances selectivity of the O-O coupling initiated by the oxyl oxygen.
Смотреть статью,
Scopus,
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bogdanov E. V., Molokeev M. S., Gorev M. V., Kartashev A. V., Laptash N. M., Flerov I. N.
Заглавие : Phase transition in RbCdZrF7: Structure and thermal properties
Место публикации : J. Fluor. Chem. - 2021. - Vol. 245. - Ст.109748. - ISSN 00221139 (ISSN), DOI 10.1016/j.jfluchem.2021.109748
Примечания : Cited References: 30. - The reported study was funded by RFBR according to the research project No. 18-02-00269 a. X-ray and dilatometric data were obtained using the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: X-ray, calorimetric and dilatometric studies of RbCdZrF7 revealed the existence of the second order phase transition Cmcm - P21/m at T0 = 200 K. The structure of the initial and distorted phases is ordered. The phase transition is associated with displacements of fluorine atoms, which leads to minor rotations of the CdF7 and ZrF7 pentagonal bipyramids. A small change in entropy, 0.1R, is characteristic of displacive-type transformations. An anomalously high susceptibility of the transition temperature to hydrostatic pressure was found.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shustin M. S., Potkina M. N.
Заглавие : Effective easy-axis anisotropy of the two-sublattice single-chain magnet with twisted easy planes
Коллективы : Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" [20-1-4-25-1, 19-1-1-12-2]
Место публикации : Nanosyst. - Phys. Chem. Math. - 2020. - Vol. 11, Is. 6. - P.659-665. - ISSN 2220-8054, DOI 10.17586/2220-8054-2020-11-6-659-665; Наносистемы: физ., хим., матем. - ISSN 2305-7971(eISSN)
Примечания : Cited References: 15. - S. M. S. expresses deep gratitude to V. V. Val'kov. The main results of this work were with substantial use of the theory developed by him (see for example articles [10], [12] and references given in them), as well as on his previous advice. S. M. S. and M. N. P. acknowledges the support from the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" (Grants No. 20-1-4-25-1 and 19-1-1-12-2, respectively)
Аннотация: An analytical solution for the spin-wave spectrum of the two-sublattice 1D magnet with SA = SB = 1 and twisting easy planes has been obtained. Such planes are mutually twisted by an angle φ relative to each other. For the case of mutually orthogonal easy planes φ = π/2, the spectrum vs. quasi-momentum dependence has been compared with that of an easy-axis magnet with the easy axis aligned along the line of intersection of the planes. An analogy of the spectra of the models has been shown, indicating the possibility of the effective easy axis anisotropy in easy-plane two-sublattice single-chain magnets.
Смотреть статью,
РИНЦ,
Scopus,
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korzhneva K. E., Bekenev V. L., Khyzhun O. Y., Goloshumova A. A., Tarasova A. Y., Molokeev M. S., Isaenko L. I., Kurus A. F.
Заглавие : Single crystal growth and the electronic structure of Rb2Na(NO3)3: Experiment and theory
Место публикации : J. Solid State Chem. - 2021. - Vol. 294. - Ст.121910. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2020.121910
Примечания : Cited References: 54. - This work was done on state assignment of IGM SB RAS, Ministry of Science and Higher Education of the Russian Federation; NSU BCH-2020-0036-4 (10988) (XRD analysis), and was supported by Russian Foundation for Basic Research (grants Nos. 18-32-00359 , 19-42-540012)
Аннотация: Rb2Na(NO3)3 crystals demonstrate nonlinear optical properties and can be used as a converter of laser radiation in the shortwave region. The crystals were grown in the present work by the Bridgman–Stockbarger method in a ratio of 75 wt%(RbNO3) and 25 wt%(NaNO3). After the growth, a transparent centimeter size single crystal (6 cm long) was obtained for the first time that is very important for its practical application. The unit cell volume of double Rb2Na(NO3)3 nitrate is intermediate between the cell volumes of simple rubidium and sodium nitrates, RbNO3 and NaNO3. Electronic structure of Rb2Na(NO3)3 was studied in the present work from both experimental and theoretical viewpoints. In particular, employing X-ray photoelectron spectroscopy, we have measured binding energies of core electrons and energy distribution of the electronic states within the valence band region of the Rb2Na(NO3)3 crystal and established rather big binding energies for N 1s and O 1s core-level electrons. The bombardment of middle-energy Ar+ ions induces transformation of some nitrogen atoms of the analyzing topmost layers of the Rb2Na(NO3)3 crystal surface from the NO3– group to the NO2– group. To explore in detail the filling of the valence band of Rb2Na(NO3)3 by electronic states associated with constituting atoms, we use first-principles calculations within a density functional theory (DFT) framework. The DFT calculations reveal that O 2p states are the principal contributors to the valence band bringing the main input in its upper portion. The theoretical finding is supported experimentally by fitting the X-ray photoelectron valence band spectrum and the X-ray emission O Kα band on the total energy scale. The conduction band bottom of Rb2Na(NO3)3 is composed by unoccupied O 2p and N 2p states in almost equal proportion.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisenko Y. G., Sedykh A. E., Molokeev M. S., Oreshonkov A. S., Aleksandrovsky A. S., Krylov A. S., Khritokhin N. A., Sal'nikova E. I., Andreev O. V., Muller-Buschbaum K.
Заглавие : Crystal and electronic structure, thermochemical and photophysical properties of europium-silver sulfate monohydrate AgEu(SO4)2·H2O
Место публикации : J. Solid State Chem. - 2021. - Vol. 294. - Ст.121898. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2020.121898
Примечания : Cited References: 54. - This work was partially supported by the Russian Foundation for Basic Research (Grant 19-33-90258∖19 ). Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS» is acknowledged
Аннотация: In order to synthesize single crystals of europium-silver double sulfate monohydrate, a hydrothermal reaction route was used. It was found that the crystallization cannot be performed under standard conditions. The compound AgEu(SO4)2·H2O crystallizes in the trigonal crystal system, space group P3221 (a = 6.917(1), c = 12.996(2) Å, V = 538.53(17) Å3). The structure consists of triple-capped trigonal prisms [EuO9], in which one oxygen atom belongs to crystalline water, silver octahedra [AgO6], and sulfate tetrahedra [SO4]. The hydrogen bonds in the system additionally stabilize the structure. The electronic band structure wasstudied by density functional theory calculations which show that AgEu(SO4)2·H2O is an indirect band gap dielectric. Temperature dependent photoluminescence spectroscopy shows emission bands of transitions from the 5D0 state to the spin-orbit components of the 7FJmultiplet (J = 0–6).The ultranarrow transition 5D0 - 7F0 shows a red shift with respect to other europium-containing water-free sulfates that is ascribed to the presence of OH group in the crystal structure in the close vicinity of the Eu3+ ion. An effect of abnormal sensitivity of the Ω4 intensity factor to minor distortions of the local environment is detected for the observed low local symmetry of C2.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Головнев Н. Н., Молокеев, Максим Сергеевич, Стерхова И. В., Иваненко Т. Ю.
Заглавие : Структура и свойства 2-тиобарбитурато-2,2’- дипиридильного комплекса железа(II)
Место публикации : Журн. СФУ. Химия. - 2020. - Т. 13. № 4. - С. 479-488. - ISSN 1998-2836 (ISSN), DOI 10.17516/1998-2836-0198; J. Sib. Fed. Univ. Chem. - ISSN 2313-5530 (eISSN)
Примечания : Библиогр.: 24. - Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта№ 19-52-80003
Аннотация: Методом РСА определена структура (cif-file CCDC № 1831367) моноядерного комплекса [Fe(Bipy)(H2O)2(Htba)2]∙6H2O (I), где Bipy = 2,2’-дипиридил и Н2tba = 2-тиобарбитуровая кислота. Кристаллы I ромбические: a = 17.4697(7), b = 11.7738(4), c = 13.4314(5) Å, V = 2762.6(2), пр. гр. Pnma, Z = 4. В экваториальной плоскости октаэдрического комплекса расположены два атома азота молекулы Bipy и две молекулы воды, а два S-координированных иона Htba− занимают аксиальные позиции. Структура стабилизирована многочисленными водородными связями N−H∙∙∙O, O−H∙∙∙O, С−H∙∙∙O, C−H∙∙∙S и π–π-взаимодействием между молекулами Bipy и ионами Нtba−. Соединение охарактеризовано методами порошковой рентгенографии, термического анализа и ИК-спектроскопии.The structure of the mononuclear complex [Fe(Bipy)(H2O)2(Htba)2]∙6H2O (I), where Bipy – 2,2’-dipyridine, H2tba – 2-thiobarbituric acid (C4H4N2O2S), was determined by single crystal X-ray diffraction technique (cif-file CCDC No. 1831367). Crystals I are rhombic: a = 17.4697 (7), b = 11.7738 (4), c = 13.4314 (5) Å, V = 2762.6(2) Å3, space group Pnma, Z = 4. Two nitrogen atoms of the Bipy molecule and two water molecules are located in the equatorial plane of the octahedral complex, and two S-coordinated Htba− ions the axial positions are occupied. The structure is stabilized by N−H∙∙∙O, O−H∙∙∙O, С−H∙∙∙O, C−H∙∙∙S intermolecular hydrogen bonds and π–π interaction between Bipy and Htba−. The compound is characterized by the methods of powder X-ray diffraction, thermal analysis, and IR spectroscopy.
Смотреть статью,
РИНЦ,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou, Guojun, Liu, Zhiyang, Molokeev M. S., Xiao, Zewen, Xia, Zhiguo, Zhang, Xian-Ming
Заглавие : Manipulation of Cl/Br transmutation in zero-dimensional Mn2+-based metal halides toward tunable photoluminescence and thermal quenching behaviors
Место публикации : J. Mater. Chem. C. - 2021. - Vol. 9, Is. 6. - P.2047-2053. - ISSN 2050-7526, DOI 10.1039/d0tc05137c. - ISSN 2050-7534(eISSN)
Примечания : Cited References: 56. - The present work was financially supported by the Natural Science Foundation of China (21871167), and 1331 Project of Shanxi Province and the Postgraduate Innovation Project of Shanxi Normal University (2019XBY018), and funded by RFBR according to the research project no. 19-52-80003
Аннотация: Low-dimensional-networked metal halides are attractive for the screening of emitters applied in solid-state lighting and displays, but the lead toxicity and poor stability are obstacles that must be overcome in industrial applications. Herein, we aim at the discovery of bright and stable photoluminescence in zero-dimensional (0D) Mn2+-based metal halides. By manipulation of Cl/Br transmutation, the nature of the halogen can be confirmed as a pivotal factor to tune the PL behaviors, and the optimum Mn2+ emission with a high PLQY of 99.8% and a short lifetime of 0.372 ms can be achieved in (C24H20P)2MnBr4. The thermal quenching behaviors have been discussed in depth, indicating that the synergistic effect of good chemical stability of organic groups, a long Mn⋯Mn distance of 10.447 Å and a relatively large activation energy (ΔE = 0.277 eV) provides a platform for achieving excellent thermal stability in (C24H20P)2MnBr4. Moreover, the as-fabricated white LED device with a high luminous efficacy of 118.9 lm W−1 and a wide color gamut of 105.3% National Television System Committee (NTSC) shows that (C24H20P)2MnBr4 can be employed as a desirable narrow-band green emitter for LED displays. This work provides a new understanding of fine tailoring halogens, and proposes a feasible approach to achieving high thermal stability emitters toward the targeted practical applications.
Смотреть статью,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yadav A., Yadav N., Agrawal V., Polyutov S. P., Tsipotan A. S., Karpov S. V., Slabko V. V., Yadav V. S., Wu Y. L., Zheng H. Y., RamaKrishna S.
Заглавие : State-of-art plasmonic photonic crystals based on self-assembled nanostructures
Коллективы : Taishan Scholar scheme of Shandong Province, China [20190401]; Ministry of Science and Higher Education of Russian Federation [FSRZ-2020-0008]
Место публикации : J. Mater. Chem. C. - 2021. - Vol. 9, Is. 10. - P.3368-3383. - ISSN 2050-7526, DOI 10.1039/d0tc05254j. - ISSN 2050-7534(eISSN)
Примечания : Cited References: 127. - All the authors acknowledge the respective department for providing facilities and resources. We acknowledge funding support from Taishan Scholar scheme of Shandong Province, China (ts 20190401). SPP and SVK acknowledge support of the Ministry of Science and Higher Education of Russian Federation, project no. FSRZ-2020-0008
Аннотация: Controlled self-assembly of plasmonic photonic nanostructures provides a cost-effective and efficient methodology to expand plasmonic photonic nano-platforms with unique, tunable, and coupled optical characteristics. Keeping advantages and challenges in view, this review highlights contemporary advancements towards the development of self-assembly of a plasmonic photonic nanostructure using a colloidal solution and a self-assembly modeling technique along with exploring novel optical properties and associated prospects. The potential applications of self-assembled plasmonic photonic nano-systems to investigate next-generation optoelectronic devices, the need to reduce and increase scaling up aspects, and improve the performance, are also covered briefly in the review. The need of considerable efforts for the design and development towards establishing novel cost-effective methods to fabricate controlled self-assembled smart nano-plasmonic platforms is also highlighted in this mini-review. Key confronting issues that precisely limit the self-assemblies of photonic nanostructures and desired integration with other device components, mainly including uniformity within miniaturized devices are also discussed. This review will serve as a guideline and platform to plan advanced research in developing self-assembled plasmonic photonic nano-systems to investigate smart functional optical devices.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Deyneko D. V., Spassky D. A., Morozov V. A., Aksenov S. M., Kubrin S. P., Molokeev M. S., Lazoryak B. I.
Заглавие : Role of the Eu3+ Distribution on the Properties of β-Ca3(PO4)2 Phosphors: Structural, Luminescent, and 151Eu Mössbauer Spectroscopy Study of Ca9.5-1.5xMgEux(PO4)7
Место публикации : Inorg. Chem. - 2021. - Vol. 60, Is. 6. - P.3961-3971. - ISSN 1520510X (ISSN), DOI 10.1021/acs.inorgchem.0c03813
Примечания : Cited References: 49. - This research was supported by the Russian Science Foundation (Grant 19-77-10013). The authors are grateful to A. V. Morozov (Skolkovo Institute of Science and Technology) for EDX measurements and F. D. Fedyunin for his help with luminescence measurements
Аннотация: The series of β-Ca3(PO4)2-type phosphors Ca9.5–1.5xMgEux(PO4)7 were synthesized by a solid-state route. Observation of the proper Eu3+ ion distribution in the Ca9.5Mg(PO4)7 host matrix was made by a direct method using 151Eu Mössbauer spectroscopy in combination with X-ray analysis and dielectric and luminescent spectroscopy. The photoluminescence properties were studied in detail. The samples exhibit an exceptionally narrow-band red emission according to the dominant 5D0 → 7F2 transition and fulfill the industrial requirements for high-energy-efficiency red phosphors. The contribution of Eu3+ ions in different crystal sites to the luminescent properties is discussed in detail. The difference of the excitation of Eu3+ in the M1 and M2 sites was revealed by photoluminescence excitation spectra in accordance with structure refinement. The temperature dependence of the luminescence intensity was studied. Different tendencies in the thermal behavior of emission lines allow one to consider the studied compounds as phosphors suitable for luminescence thermometry. The measured quantum yield for Ca9.5–1.5xMgEux(PO4)7 shows excellent results and reaches 63%.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие