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1.
Bukhanov, E. R.
A study of wheat wax optical properties / E. R. Bukhanov, Y. L. Gurevich, K. A. Shabanova> //
Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) : IEEE, 2019. - P. 2890-2897. - (Progress in Electromagnetics Research Symposium),
DOI
10.1109/PIERS-Fall48861.2019.9021781. - Cited References: 36
Перевод заглавия:
Изучение оптических свойств воска пшеницы
РУБ
Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
DIMENSIONAL PHOTONIC CRYSTALS
BLUE-GREEN
FLUORESCENCE
Аннотация:
Epicuticular waxes are a multifunctional interface between a plant and the environment. In this paper wheat leaves wax has been studied. Wax isolation was carried out using the method of gradual freezing in water followed by slow thawing. The morphology of the samples obtained was observed with a Hitachi SU3500 electron microscope. The structure period is determined by the nanotubes diameter which equals 150-200 nm. Random orientation of their long axes in the layer allows using a one-dimensional model to calculate the transmission spectrum of a photonic crystal with the help of the transfer matrix method. While making the calculations a defect that may be caused by possible interlayer heterogeneity also must be taken into account. Numerical modeling made it possible to identify the stop zone and the defective mode. Intense
fluorescence
appears in the optical area of the wax layer under ultraviolet radiation, thus increasing the efficiency of photosynthesis.
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Держатели документа:
Kirensky Inst Phys Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Доп.точки доступа:
Gurevich, Y. L.; Shabanova, K. A.; Буханов, Евгений Романович; Photonics and Electromagnetics Research Symposium - Fall(2019 ; Dec 17-20 ; Xiamen, China)
}
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2.
Влияние строения на
оптические свойства эпикулярного воска голубой ели (Picea pungens) / Е. Р. Буханов, А. В. Шабанов, М. Н. Крахалев [и др.]> // Ученые зап. физ. фак-та МГУ. - 2019. -
№ 5
. - Ст. 1950502. - Библиогр.: 36 . - ISSN 2307-9665
Перевод заглавия:
The effect of the structure on the optical properties of epicular blue spruce wax (Picea pungens)
Кл.слова (ненормированные):
фотонный кристалл
--
дефектная мода
--
изоляция воскового слоя
--
иризация
--
флуоресценция
--
photonic crystal
--
defect mode
--
wax isolation
--
irisation
--
fluorescence
Аннотация:
Выполнено исследование морфологических и оптических характеристик с эпикулярного воскового слоя голубой ели (Picea pungens). Методом сканирующей электронной микроскопии выявлены структурные единицы – трубочки диаметром 150-200нм и длиной 3-5 мкм. Обнаружен эффект иризации от доменов воскового слоя. В отраженном свете домены имею голубую окраску, при наблюдении в проходящем свете приобретают розоватый оттенок. Эти оптические характеристики являются основными признаками фотоннокристаллической структурой. Проведено численное моделирование спектра пропускания с выявленными структурными оптическими параметрами с использованием метода трансфер матриц. Спектр максимума флюоресценции совпадает с дефектной модой рассчитанного спектра пропускания.
The study of morphological and optical characteristics of the epicular wax layer of blue spruce (Picea pungens). The method of scanning electron microscopy revealed structural units - tubes with a diameter of 150-200 nm and a length of 3-5 microns. An iridescence effect from the wax layer domains has been detected. In the reflected light, the domains have a blue color, when observed in transmitted light acquire a pinkish tint. These optical characteristics are the main features of the photonic crystal structure. A numerical simulation of the transmission spectrum with the identified structural optical parameters was carried out using the transfer matrix method. The spectrum of the maximum fluorescence coincides with the defect mode of the calculated transmission spectrum.
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РИНЦ
Держатели документа:
Институт физики имени Л. В. Киренского ФИЦ КНЦ СО РАН, Россия, 660036, Красноярск
ФИЦ КЦН СО РАН, Россия, 660036, Красноярск
Доп.точки доступа:
Буханов, Евгений Романович; Bukhanov, E. R.; Шабанов, Александр Васильевич; Shabanov, A. V.; Крахалев, Михаил Николаевич; Krakhalev, M. N.; Волочаев, Михаил Николаевич; Volochaev, M. N.; Гуревич, Юрий Леонидович
}
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3.
Modeling of Electronic
Spectra of Ionic Forms of Eosin and Erythrosin / A. V. Rogova, F. N. Tomilin, M. A. Gerasimova, E. A. Slyusareva> // Russ. Phys. J. - 2020. -
Vol. 63
,
Is. 8
. - P. 1417-1423,
DOI
10.1007/s11182-020-02186-1. - Cited References: 17 . - ISSN 1064-8887
Кл.слова (ненормированные):
eosin
--
erythrosin
--
ionic forms
--
non-stationary density functional theory TD-DFT
--
B3LYP
--
polarized continuum model
--
electronic spectra
--
absorption
--
fluorescence
Аннотация:
Multistage dissociation of fluoroscein dyes, widely used in biological labeling, yields a variety of ionic and tautomeric forms in a wide range of pH values. In contrast to well-studied absorption spectra, the emission spectra are not quite readily interpreted due to their strong overlapping and proton transfer in electronically excited states. The least studied are the fluorescent properties of eosin and erythrosin dyes containing heavy atoms (Br, I), in which the characteristics of the dianionic form only are reliably determined. In the framework of the density functional theory using the B3LYP-functional including nonequilibrium solvation, the geometries of the series of ionic forms of eosin and erythrosin in the ground and excited states are found, and the electronic spectra are calculated. Based on the identified linear regression of the calculated and experimental data for the earlier resolved electronic spectra, for the first time, the emission spectrum maxima of the monoanionic, neutral quinoid, and cationic forms of the dyes are determined. The spectral peculiarities (Stokes shifts) are discussed in terms of variation of the molecule and ion geometries in the ground and excited states.
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Публикация на русском языке
Моделирование электронных спектров ионных форм эозина и эритрозина [Текст] / А. В. Рогова, Ф. Н. Томилин, М. А. Герасимова, Е. А. Слюсарева // Изв. вузов. Физика. - 2020. - Т. 63 № 8. - С. 115-121
Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Kirenskii Institute of Physics of the Siberian Branch of the Russian Academy of Sciences – Division of the Federal Research Center, Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Rogova, A. V.; Tomilin, F. N.; Томилин, Феликс Николаевич; Gerasimova, M. A.; Slyusareva, E. A.
}
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4.
Fluorescence
and photoinduced
proton transfer in the protolytic forms of fluorescein: Experimental and computational study / M. A. Gerasimova [et al.]> // Dyes Pigm. - 2020. -
Vol. 173
. - Ст. 107851,
DOI
10.1016/j.dyepig.2019.107851. - Cited References: 58. - This work is supported by the Russian Foundation for Basic Research, Russia (project 19-02-00450 ). S.A.V. thanks the National Science Foundation, United States for financial support through a CAREER Award ( CHE-1654547 ). . - ISSN 0143-7208
Кл.слова (ненормированные):
Fluorescein protolytic forms
--
Absorption
--
Fluorescence
--
TD-DFT
--
Proton transfer
--
Excited-state dissociation constant
Аннотация:
In contrast to the well-studied absorption spectra of different protolytic forms of fluorescein, the complex structure of the
fluorescence
spectra in a wide pH range is not completely understood because of the interplay between emission and photoinduced proton transfer in the electronic excited states. We provide insight into this interplay through a combined analysis of the experimental data, obtained by absorption and steady-state
fluorescence
spectroscopy at pH 0.3–10.5, and the time-dependent density functional theory (TD-DFT). The TD-DFT based computational model is validated on dianion and used to model the spectra of other protolytic forms. The protolytic/tautomeric forms of fluorescein are classified according to the partial charges on the triple chromophore ring, and electronic transitions are analyzed in terms of changes in molecular geometries and orbitals. A linear regression analysis between the calculated and experimental results based on both absorption and well-understood dianionic and cationic
fluorescence
peaks is used to assign the monoanionic (496 nm), neutral quinoid (550 nm) and neutral zwitterionic (483 nm)
fluorescence
peaks, whose positions were not clear prior to this work. The values of the excited-state dissociation microconstants pka* for different forms of fluorescein are calculated by means of the Forster cycle in conjunction with the spectroscopic measurements and computational data.
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Держатели документа:
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Department of Chemistry, University of Nevada, Reno, North Virginia Street 1664, Reno, NV 89557-0216, United States
Research Center for Computational Design of Advanced Functional Materials, National Institute of Advanced Industrial Science and Technology, Central 2, Umezono 1-1-1, Tsukuba, 305-8568, Japan
Доп.точки доступа:
Gerasimova, M. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Malyar, E. Y.; Varganov, S. A.; Fedorov, D. G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Slyusareva, E. A.
}
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5.
Ratio fluorescent hybrid
probe for visualized
fluorescence
detection of H2O2 in vitro and in vivo / R. Dong, Y. Yao, D. Li [et al.]> // Sens. Actuators B: Chem. - 2020. -
Vol. 321
. - Ст. 128643,
DOI
10.1016/j.snb.2020.128643. - Cited References: 65. - The present work was supported by the National Natural Science Foundations of China (Grant No. 21671070 ), the project supported by the GDUPS (2018) for Prof. Bingfu LEI, the Project for Construction of High-level University in Guangdong Province of China, the Guangzhou Science & Technology Project , China (No. 201707010033 ), the Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (No. 201910564035 ), and the National Undergraduate Innovation and Entrepreneurship Training Program granted for Riyue Dong . - ISSN 0925-4005
Перевод заглавия:
Соотношение флуоресценции в гибридных зондах для визуального детектирования флуоресценции H2O2 in vitro и in vivo
Кл.слова (ненормированные):
Si-O
--
QDs
--
Ag
--
Nanoclusters
--
Visualized
fluorescence
detection
--
H2O2 sensing in vivo and in vitro
Аннотация:
A silicon oxide quantum dots (Si-O QDs) and Ag nanoclusters hybrid nanosensing probe with dual-emission and small nanocrystals that acts as an “off-on” ratio fluorescent probe for hydrogen peroxide (H2O2) detection was developed. The probe was used to measure the H2O2 concentration generated by mitochondria in vitro via recording the I455/I680
fluorescence
ratio. Furthermore, this hybrid probe was applied to monitor the wound-induced H2O2 in lettuce leaf, and realized the visualized
fluorescence
qualitative detection H2O2 in vivo via laser scanning confocal microscope. The working mechanism of the probe is also investigated. Inner filter effect (IFE) estimation, Fourier transform infrared (FTIR) spectra and high-resolution transmission electron microscopy (HRTEM) images were applied to study the quenching mechanism and recovering reason of Si-O QDs
fluorescence
. The results show that the blue
fluorescence
of Si-O QDs can be quenched by Ag NCs via the IFE and fluorescent resonance energy transfer (FRET) effect. After adding H2O2, the surface groups of Ag NCs was changed and the IFE and FRET effects between the Si-O QDs and Ag NCs are disabled, thus the quenched Si-O QDs luminescence can be regularly recovered.
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Держатели документа:
College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou, 510642, China
Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, Guangzhou, 510642, China
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Dong, R.; Yao, Y.; Li, D.; Zhang, H.; Li, W.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, Y.; Lei, B.
}
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6.
Structural analysis and
optical temperature sensing performance of Eu3+-doped Ba3In(PO4)3 / G. Q. Zhang, M. S. Molokeev, Q. C. Ma [et al.]> // CrystEngComm. - 2020. -
Vol. 22
,
Is. 35
. - P. 5809-5817,
DOI
10.1039/d0ce00997k. - Cited References: 52. - This work was supported by the National Natural Science Foundation of China (Grant No. 51802172) and the Qinghai Provincial Natural Science Foundation for Young Scholars (No. 2018-ZJ-957Q) . - ISSN 1466-8033
Перевод заглавия:
Структурный анализ и эффективность оптического измерения температуры Ba3In(PO4)3, легированного Eu3+
РУБ
Chemistry, Multidisciplinary + Crystallography
Рубрики:
FLUORESCENCE
INTENSITY RATIO
UP-CONVERSION EMISSIONS
RARE-EARTH IONS
Аннотация:
Eu3+-Doped Ba3In(PO4)3 was synthesized through a high-temperature solid-phase method. According to the structure refinement based on X-ray diffraction and density functional theory, the crystal and energy band structures of Ba3In(1−x)(PO4)3:xEu3+ were studied and analyzed in detail. The effect of Eu3+ doping concentrations on emission was studied at an excitation wavelength of 393 nm. For the material Ba3In(1−x)(PO4)3:xEu3+(x = 0.01–0.30), the optimal doping level is confirmed to be 0.18. Due to the thermal quenching differences of Eu3+ at the 5D0 and 5D1 energy levels, and based on the temperature-variable
fluorescence
intensity ratio between emission peaks, the optical temperature measurement performance of this material in the temperature range from 298.15 K to 623.15 K was characterized, and the maximum absolute and relative sensor sensitivities (Sa and Sr) were determined to be 0.1002 K−1 and 4.058%, respectively. With temperature as the only variable, the color of the phosphor changes from red to yellow light with rising temperature. Besides, Sa and Sr values of this phosphor are comparable to other sensing materials. The results indicate that Eu3+-doped Ba3In(PO4)3 phosphors have great potential to be applied in optical temperature sensing.
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Держатели документа:
Qinghai Univ, Qinghai Prov Engn Res Ctr High Performance Light, Qinghai Prov Key Lab New Light Alloys, Xining 810016, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Доп.точки доступа:
Zhang, Guangqing; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ma, Qianchao; Yang, Xuening; Han, Shuiquan; Chen, Q.i.; Zhong, Binnian; Ma, Bin
}
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7.
Interactions of chemically
synthesized ferrihydrite nanoparticles with human serum transferrin: Insights from
fluorescence
spectroscopic studies / C. G. Chilom, N. Sandu, S. Iftimie [et al.]> // Int. J. Mol. Sci. - 2021. -
Vol. 22
,
Is. 13
. - Ст. 7034,
DOI
10.3390/ijms22137034. - Cited References: 39. - The work was accomplished with the financial support of the RO-JINR Projects No. 365/11.05.2021, items 8, 87 and 98 and respectivelly, No. 366/11.05.2021, items 7, 86 and 97 . - ISSN 1661-6596
Кл.слова (ненормированные):
Ferrihydrite nanoparticles
--
Human serum transferrin
--
Binding mechanism
--
Driving forces
--
Molecular docking
Аннотация:
Human serum transferrin (HST) is a glycoprotein involved in iron transport that may be a candidate for functionalized nanoparticles to bind and target cancer cells. In this study, the effects of the simple and doped with cobalt (Co) and copper (Cu) ferrihydrite nanoparticles (Fh-NPs, Cu-Fh-NPs, and Co-Fh-NPs) were studied by spectroscopic and molecular approaches.
Fluorescence
spectroscopy revealed a static quenching mechanism for all three types of Fh-NPs. All Fh-NPs interacted with HST with low affinity, and the binding was driven by hydrogen bonding and van der Waals forces for simple Fh-NPs and by hydrophobic interactions for Cu-Fh-NPs and Co-Fh-NPs binding, respectively. Of all samples, simple Fh-NPs bound the most to the HST binding site.
Fluorescence
resonance energy transfer (FRET) allowed the efficient determination of the energy transfer between HST and NPs and the distance at which the transfer takes place and confirmed the mechanism of quenching. The denaturation of the HST is an endothermic process, both in the case of apo HST and HST in the presence of the three types of Fh-NPs. Molecular docking studies revealed that Fh binds with a low affinity to HST (Ka = 9.17 × 103 M−1) in accord with the
fluorescence
results, where the interaction between simple Fh-NPs and HST was described by a binding constant of 9.54 × 103 M−1.
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Держатели документа:
Department of Electricity, Solid Physics and Biophysics, Faculty of Physics, University of Bucharest, Str Atomistilor 405, CP MG 11, Magurele, RO?077125, Romania
Joint Institute for Nuclear Research, Joliot?Curie No. 6, Dubna, 141980, Russian Federation
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Magurele, RO?077125, Romania
Moscow Institute of Physics and Technology, Institutskiy Per. No. 9, Dolgoprudniy, 141701, Russian Federation
Krasnoyarsk Science Center of the Siberian, Branch of the Russian Academy of Sciences, Akademgorodok St. No.50, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Chilom, C. G.; Sandu, N.; Iftimie, S.; Balasoiu, M.; Rogachev, A.; Orelovich, O.; Stolyar, S. V.; Столяр, Сергей Викторович
}
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8.
Intracavity enhancement of
GFP
fluorescence
induced by femtosecond laser pulses / S. A. Vyunisheva, S. A. Myslivets, N. N. Davletshin [et al.]> // Spectrochim. Acta A. - 2023. -
Vol. 300
. - Ст. 122885,
DOI
10.1016/j.saa.2023.122885. - Cited References: 23 . - ISSN 1386-1425. - ISSN 1873-3557
Перевод заглавия:
Внутрирезонаторное усиление флуоресценции GFP, индуцированное фемтосекундными лазерными импульсами
Кл.слова (ненормированные):
Fluorescence
--
Green fluorescent protein
--
Microcavity
--
Photonic crystal
--
Photonic band gap
--
Femtosecond laser pulses
Аннотация:
The phenomenon of
fluorescence
is widely used in molecular biology for studying the interaction of light with biological objects. In this article, we present an experimental investigation of the enhancement of laser-induced
fluorescence
of Clytia gregaria green fluorescent protein. The laser-induced
fluorescence
method applied in our work combines the advantages of femtosecond laser pulses and a photonic crystal cavity, with the time dependence of the
fluorescence
signal studied. It is shown that a green fluorescent protein solution placed in a microcavity and excited by femtosecond laser pulses leads to an increase in
fluorescence
on the microcavity modes, which can be estimated by two orders of magnitude. The dependences of
fluorescence
signal saturation on the average integrated optical pump power are demonstrated and analyzed. The results obtained are of interest for the development of potential applications of biophotonics and extension of convenient methods of laser-induced
fluorescence
.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, Bldg. 38, Krasnoyarsk, 660036, Russia
Sukachev Institute of Forest, Federal Research Center KSC SB RAS, Akademgorodok 50, Bldg. 28, Krasnoyarsk, 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Academician Kirensky Str. 26, Krasnoyarsk, 660074, Russia
Institute of Biophysics, Federal Research Center KSC SB RAS, Akademgorodok 50, Bldg. 50, Krasnoyarsk, 660036, Russia
Department of Chemical Technology of Wood and Biotechnology, Reshetnev Siberian State University of Science and Technology, Mira Ave. 82, Krasnoyarsk, 660049, Russia
Доп.точки доступа:
Vyunisheva, S. A.; Вьюнышева Софья Александровна; Myslivets, S. A.; Мысливец, Сергей Александрович; Davletshin, Nikolay N.; Давлетшин, Николай Николаевич; Eremeeva, Elena V.; Vysotski, Eugene S.; Pavlov, Igor N.; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
}
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9.
Строение, оптические и
спектральные характеристики эпикутикулярного воска хвои ели голубой / Е. Р. Буханов, А. Д. Шефер, А. В. Шабанов [и др.]> // Сибирский лесной журнал. - 2024. -
№ 1
. - С. 97-106,
DOI
10.15372/SJFS20240111. - Библиогр.: 33 . - ISSN 2311-1410. - ISSN 2312-2099
Перевод заглавия:
Structure, optical and spectral characteristics of epicuticular wax of blue spruce needles
Кл.слова (ненормированные):
фотонный кристалл
--
электронная микроскопия
--
оптическая микроскопия
--
флуоресцентная спектроскопия
--
численное моделирование одномерных фотонных кристаллов
--
Picea pungens Engelm
--
photonic crystal
--
electron microscopy
--
optical microscopy
--
fluorescence
spectroscopy
--
numerical modeling of one-dimensional photonic crystals
--
Picea pungens Engelm
Аннотация:
Предложен метод по отделению чистых пластин эпикутикулярного воска. Использование воды, способной глубоко проникать в восковые структуры под действием сил Ван-дер-Ваальса и расширяться при замерзании, позволяет быстро получить незагрязненные восковые пластины с нативной структурой без каких-либо сторонних химических примесей. С помощью сканирующей электронной микроскопии были получены снимки воска хвои голубой ели (Picea pungens Engelm.). Определены его морфологические и структурные характеристики. Отличительной особенностью является наличие восковых нанотрубочек с характерными диаметром ~150 нм и длиной 3–5 мкм. Нанотрубочки лежат друг на друге стопками, образуя одномерную длиннопериодическую решетку. Проведены микроскопические наблюдения воска, сделанные в отраженном и прошедшем свете. Показано, что покрытие хвои голубой ели состоит из микрочастичек воска, обладающие структурным окрасом. В широком спектральном диапазоне отдельные частички изменяют цвет от синего до красного, как следствие, большие конгломераты частичек имеют белый цвет. Получены спектры флуоресценции хвои с нативным восковым покровом и той же самой хвои после удаления воска. При сравнении ширины линий флуоресценции на полувысоте хвоинки голубой ели с воском и без, выявлено влияние воскового слоя на время жизни возбужденных электронов в фотосистеме II, тем самым установлена связь между восковым покровом и процессом фотосинтеза. Методом трансфер матриц выполнены расчеты спектров пропускания для решетки схожей с восковой структурой, хлоропластом и сочетанием восковой структуры с хлоропластом. В последнем варианте длинноволновая зона селективного отражения значительно шире, чем у отдельных случаев. При рассмотрении структуры, содержащей хлоропласт и эпикутикулярный воск, наблюдается небольшое расщепление стоп-зоны, как при наличии дефекта, что способствует высокой концентрации энергии в месте расщепления. Вследствии роста концентрации энергии увеличивается плотность фотонных состояний на соответствующих длинах волн. Этот эффект важен для фотосинтеза, поскольку согласно золотому правилу Ферми, скорость реакции пропорциональна плотности фотонных состояний. Результаты расчетов находятся в хорошем согласии с экспериментальными спектрами.
A method for separating clean plates of epicuticular wax has been proposed. The use of water, which can penetrate deeply into wax structures under the influence of van der Waals forces and expand upon freezing, allows to quickly obtain uncontaminated wax plates with a native structure without any third-party chemical impurities. Using scanning electron microscopy, images of blue spruce ( Picea pungens Engelm.) needle wax were obtained. Its morphological and structural characteristics have been determined. A distinctive feature is the presence of wax nanotubules with a characteristic diameter of ~150 nm and a length of 3-5 μm. Nanotubes lie on top of each other in stacks, forming a one-dimensional long-period lattice. Microscopic observations of the wax were made in reflected and transmitted light. It has been shown that the coating of blue spruce needles consists of microparticles of wax with a structural color. In a wide spectral range, individual particles change color from blue to red, as a result, large conglomerates of particles are white.
Fluorescence
spectra of needles with native wax cover and the same needles after wax removal were obtained. When comparing the width of
fluorescence
lines at half-height of blue spruce needles with and without wax, the influence of the wax layer on the lifetime of excited electrons in photosystem II was revealed, thereby establishing a connection between the wax cover and the process of photosynthesis. Using the matrix transfer method, transmission spectra were calculated for a lattice similar to a waxy structure, a chloroplast, and a combination of a waxy structure with a chloroplast. In the latter version, the long-wave zone of selective reflection is much wider than in individual cases. When examining a structure containing a chloroplast and epicuticular wax, there is a slight splitting of the stop zone, as if there were a defect, which contributes to a high concentration of energy at the site of splitting. Due to an increase in energy concentration, the density of photonic states at the corresponding wavelengths increases. This effect is important for photosynthesis because, according to Fermi’s golden rule, the rate of reaction is proportional to the density of photonic states. The calculation results are in good agreement with the experimental spectra.
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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН – обособленное подразделение ФИЦ КНЦ СО РАН, 660036, Красноярск, Академгородок, 50/38
Федеральный исследовательский центр «Красноярский научный центр СО РАН», 660036, Красноярск, Академгородок, 50
Доп.точки доступа:
Буханов, Евгений Романович; Bukhanov, E. R.; Шефер, А. Д.; Шабанов, Александр Васильевич; Shabanov, A. V.; Гуревич, Ю. Л.; Крахалев, Михаил Николаевич; Krakhalev, M. N.
}
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10.
Modeling optical properties
of plant epicuticular wax / E. Bukhanov, Y. Gurevich, M. Krakhalev, D. Shabanov> //
Proceedings of ITNT 2020 - 6th IEEE International Conference on Information Technology and Nanotechnology : Institute of Electrical and Electronics Engineers Inc., 2020. - Ст. 9253272
DOI
10.1109/ITNT49337.2020.9253272. - Cited References: 39
Кл.слова (ненормированные):
photonic crystal
--
epicuticular wax
--
density of photon states
--
fluorescence
Аннотация:
Wax is found on the leaves almost of all plants. Its physicochemical and protective properties are widely discussed in the scientific literature. In the presented work, the influence of the structure of wax on the optical properties in wheat leaves and needles of blue spruce has been revealed for the first time. Long-period ordering was established. The structural elements are nanotubes up to several microns in length and about 150 nm in diameter. The paper presents the influence of a long-period structure on the optical properties and local characteristics of light waves, including the transmission spectrum, the density of photon states, as well as
fluorescence
spectra and polarization microscopy. Using modern mathematical tools, the main spectral and optical characteristics were calculated using the example of the wax cover of blue spruce and glaucas wheat. Based on calculations that establish the relationship between the structural, spectral and optical properties, the influence of wax structures on the process of photosynthesis was revealed.
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Держатели документа:
Kirensky Institute of Physics Sb Ras, Krasnoyarsk, Russian Federation
Frc Ksc Sb Ras, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Bukhanov, E. R.; Буханов, Евгений Романович; Gurevich, Y.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Shabanov, D. A.; Шабанов, Дмитрий Александрович; IEEE International Conference on Information Technology and Nanotechnology(6th ; 26 - 29 May 2020 ; Samara, Russian Federation)
}
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11.
Amino-functionalized Fe3O4@SiO2 core-shell
magnetic nanoparticles for dye adsorption / C.-R. Lin, O. S. Ivanova, D. A. Petrov [et al.]> // Nanomaterials. - 2021. -
Vol. 11
,
Is. 9
. - Ст. 2371,
DOI
10.3390/nano11092371. - Cited References: 35. - The authors are thankful for the financial support the Russian Foundation for Basic Research, Grant № 19-52-52002, Ministry of Science and Technology of Taiwan, Grants MOST № 108-2923-M-153-001-MY3 and № 109-2112-M-153-003-, the Russian Foundation for Basic Research with Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project number 19-42-240005: “Features of the electronic structure, magnetic properties and optical excitations in nanocrystals of the multifunctional magnetic chalcogenides Fe3S4 and FeSe”. We thank also the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation, where the Transmission Electron Microscopy studies were carried out . - ISSN 2079-4991
Перевод заглавия:
Амино-функциональные магнитные наночастицы ядро-оболочка Fe3O4@SiO2 для адсорбции красителей
Кл.слова (ненормированные):
Fe3O4@SiO2
--
core-shell nanoparticles
--
magnetic properties
--
water pollutions
--
fluorescence
--
adsorption
Аннотация:
Fe3O4@SiO2 core-shell nanoparticles (NPs) were synthesized with the co-precipitation method and functionalized with NH2 amino-groups. The nanoparticles were characterized by X-ray, FT-IR spectroscopy, transmission electron microscopy, selected area electron diffraction, and vibrating sample magnetometry. The magnetic core of all the nanoparticles was shown to be nanocrystalline with the crystal parameters corresponding only to the Fe3O4 phase covered with a homogeneous amorphous silica (SiO2) shell of about 6 nm in thickness. The FT-IR spectra confirmed the appearance of chemical bonds at amino functionalization. The magnetic measurements revealed unusually high saturation magnetization of the initial Fe3O4 nanoparticles, which was presumably associated with the deviations in the Fe ion distribution between the tetrahedral and octahedral positions in the nanocrystals as compared to the bulk stoichiometric magnetite. The fluorescent spectrum of eosin Y-doped NPs dispersed in water solution was obtained and a red shift and line broadening (in comparison with the dye molecules being free in water) were revealed and explained. Most attention was paid to the adsorption properties of the nanoparticles with respect to three dyes: methylene blue, Congo red, and eosin Y. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for all three dyes. The equilibrium data were more compatible with the Langmuir isotherm and the maximum adsorption capacity was reached for Congo red.
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Держатели документа:
Department of Applied Physics, National Pingtung University, Pingtung City, 90003, Taiwan
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Lin, C. -R.; Ivanova, O. S.; Иванова, Оксана Станиславовна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Chen, Y. -Z.; Gerasimova, M. A.; Zharkov, S. M.; Жарков, Сергей Михайлович; Tseng, Y. -T.; Shestakov, N. P.; Шестаков, Николай Петрович; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
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12.
Thermo-dynamical contours of
electronic-vibrational spectra simulated using the statistical quantum-mechanical methods [Text] / V. Pomogaev [et al.]> // Theor. Chem. Acc. - 2011. -
Vol. 130
,
is. 4-6
. - P609-632,
DOI
10.1007/s00214-011-0936-6. - Cited Reference Count: 112. - Гранты: We would like to acknowledge scientific discussions with the following collaborators and friends: Daniel Chipman, Victor Ya. Artyukhov for common discussions concerning theoretical questions and methodology; John S. Tse and Dennis D. Klug for initial discussions concerning the properties of cyanoanthracene; and Yuriko Aoki for discussions of benzene and estradiol. We would also like to thank the following funding agencies and institutions for supporting this work during its various stages of development: Kyushu University, Japan; Steacie Institute for Molecular Sciences, Canada; University of Notre Dame, USA; Siberian Physical-Technical Institute, Russia; Siberian Federal University, Russia; Kirensky Institute of Physics, Russia. We would like to thank FAPESP for project 16782-2/2009 which allowed Prof. Jalkanen to visit LEVB at UniVaP for the period from June 2010 to May 2011 from the Quantum Protein (QuP) Center at the Technical University in Denmark during which time this work was completed. - Финансирующая организация: Kyushu University, Japan; Steacie Institute for Molecular Sciences, Canada; University of Notre Dame, USA; Siberian Physical-Technical Institute, Russia; Siberian Federal University, Russia; Kirensky Institute of Physics, Russia . - DEC. - ISSN 1432-881X
Рубрики:
DENSITY-FUNCTIONAL THEORY
INITIO MOLECULAR-DYNAMICS
CIRCULAR-DICHROISM SPECTRA
LASER-INDUCED
FLUORESCENCE
NUCLEAR SHIELDING TENSORS
ALANINE N'-METHYLAMIDE
ALKALINE-EARTH DIMERS
ABSORPTION-SPECTRA
HYDRATED ELECTRON
AQUEOUS-SOLUTION
Кл.слова (ненормированные):
organic compounds
--
molecular dynamics
--
photophysical properties
--
electronic spectra
--
electronic spectra
--
molecular dynamics
--
organic compounds
--
photophysical properties
Аннотация:
Three polycyclic organic molecules in various solvents focused on thermo-dynamical aspects were theoretically investigated using the recently developed statistical quantum mechanical/classical molecular dynamics method for simulating electronic-vibrational spectra. The absorption bands of estradiol, benzene, and cyanoanthracene have been simulated, and most notably, the increase in the spectral intensity for the lowest excited state transition as the temperature is increased observed experimentally is well reproduced. In addition, this method has been extended to treat luminescent processes also, and it is seen that the experimental emission spectrum of cyanoanthracene is also well described. The method still needs further refinement, but results to date, including those presented in this work, document clearly that our model is one which is able to treat the many complex effects that the environment have on electronic absorption and emission spectra.
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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Univ Notre Dame, Notre Dame Radiat Lab, Notre Dame, IN 46556 USA
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Vale Paraiba, Lab Biomed Vibrat Spectrscopy, Inst Res & Dev, BR-12244000 Sao Paulo, Brazil
Tech Univ Denmark, Dept Phys, Quantum Prot QuP Ctr, DK-2800 Lyngby, Denmark
Доп.точки доступа:
Pomogaev, V.; Avramov, P. V.; Аврамов, Павел Вениаминович; Kachin, S.; Pomogaeva, A.; Jalkanen, K. J.
}
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13.
Insights into Ba4Si6O16
structure and photoluminescence tuning of Ba4Si6O16:Ce3+,Eu2+ phosphors / Chen M. [et al.]> // J. Mater. Chem. C. - 2015. -
Vol. 3
,
Is. 48
. - P. 12477-12483,
DOI
10.1039/c5tc03271g. - Cited References: 39. - This work was supported by the National Natural Science Foundations of China (Grant No. 51572023 and 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306), and Fundamental Research Funds for the Central Universities (FRF-TP-14-005A1). . - ISSN 2050-7534
Перевод заглавия:
Исследования структуры Ba4Si6O16 и люминесцентных свойств Ba4Si6O16:Ce3+,Eu2+
РУБ
Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
LIGHT-EMITTING-DIODES
ENERGY-TRANSFER
LUMINESCENCE PROPERTIES
WHITE-LIGHT
GLASS-CERAMICS
BA PHOSPHORS
EMISSION
GREEN
EU2+
FLUORESCENCE
Аннотация:
The versatile polymorphism and chemical compositions of barium silicates have been studied for a long time and their crystal structures have been established. Herein, we focused on the understanding of the crystal structure of the Ba4Si6O16 phase and the structural correlation of Ba4Si6O16 and Ba2Si3O8; moreover, the luminescence properties of Ce3+,Eu2+-co-activated Ba4Si6O16 phosphors have been discussed. Ba4Si6O16:Ce3+,Eu2+ phosphors show tunable blue-green emission upon excitation with 365 nm ultraviolet (UV) light. The blue emission originates from Ce3+, whereas the bluish-green emission is ascribed to Eu2+, and variation in the emission peak wavelength from 442 to 497 nm can be achieved by properly tuning the Ce3+/Eu2+ ratio. Energy transfer from Ce3+ to Eu2+ in the Ba4Si6O16 host has been validated by the variation of emission spectra as well as the variation of Ce3+ decay lifetimes with increasing Eu2+ concentration, and the energy transfer mechanism is demonstrated to be a resonant type via a dipole-dipole process. The results suggest that Ba4Si6O16:Ce3+,Eu2+ phosphors are potential candidates as a blue-green component for UV-excited white light-emitting diodes. © 2015 The Royal Society of Chemistry.
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Держатели документа:
Key Laboratory of New Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Доп.точки доступа:
Chen M.; Xia Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu Q.
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}
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14.
Magnetic circular dichroism
analysis of crude oil / I. S. Edelman [et al.]> // J. Struct. Chem. - 2016. -
Vol. 57
,
Is. 2
. - P. 382-389,
DOI
10.1134/S0022476616020207. - Cited References:33. - The work was carried out with the partial support of the grant of the President of the Russian Federation (NSh-2886.2014.2), and in the frameworks of the base budget financing of Kirensky Institute of Physics and Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) (V.44.1.15.). . - ISSN 0022-4766. - ISSN 1573-8779
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Near-UV/visible spectroscopy
Electron-spin-resonance
Asphaltene dispersions
Single-crystals
Absorption
VO2+
EPR
FLuorescence
Aggregation
Absorbency
Кл.слова (ненормированные):
magnetic circular dichroism (MCD)
--
MCD spectroscopy
--
absorption spectroscopy of oil
Аннотация:
Optical and magneto-optical properties of solutions of crude oil of different origin (i.e., taken from different fields) are studied in the visible and near-UV region of optical emission. Magnetic circular dichroism (MCD) spectra of oil are obtained in the vicinity of wavelengths of ~410 nm, 533 nm, and 576 nm. It is demonstrated that the intensity of the MCD signal depends on the origin of crude oil, and it is proportional to the oil concentration in the solution. The comparison of the magneto-optical spectroscopy data with the chemical composition of samples allows us to conclude that the observed magneto-optical activity is determined by the presence of VO2+ complexes in the oil samples studied. The revealed magneto-optical activity of conventional oil can form a basis of a new method for the analysis of the composition and properties of oil of different origin.
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Публикация на русском языке
Исследование природной нефти с помощью спектроскопии магнитного кругового дихроизма [Текст] / И. С. Эдельман [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 394-401
Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk, Russia.
Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Zabluda, V. N.; Заблуда, Владимир Николаевич; Shubin, A. A.; Martyanov, O. N.; Russian Federation [NSh-2886.2014.2]; Kirensky Institute of Physics (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]; Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]
}
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15.
Ultraviolet
fluorescence
of
coelenteramide and coelenteramide-containing fluorescent proteins. Experimental and theoretical study / R. R. Alieva [et al.]> // J. Photochem. Photobiol. B Biol. - 2016. -
Vol. 162
. - P. 318-323,
DOI
10.1016/j.jphotobiol.2016.07.004. - Cited References: 49. - This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences (project No 01201351504); the Russian Foundation for Basic Research, Grant No 15-43-04377-sibir; and Russian president's grant NSh-7559.2016.2. . - ISSN 1011-1344
РУБ
Biochemistry & Molecular Biology + Biophysics
Рубрики:
DENSITY-FUNCTIONAL THEORY
ELECTRON-EXCITED-STATES
PHOTOPROTEIN OBELIN
DISCHARGED-OBELIN
LIGHT-EMITTERS
BIOLUMINESCENCE
AEQUORIN
LUMINESCENCE
MECHANISM
CHEMILUMINESCENCE
Кл.слова (ненормированные):
Coelenteramide
--
Fluorescent protein
--
Discharged photoproteins
--
Obelin
--
Aequorin
--
Fluorescence
--
Excitation energy
--
Fluorescence
--
B3LYP
Аннотация:
Coelenteramide-containing fluorescent proteins are products of bioluminescent reactions of marine coelenterates. They are called ‘discharged photoproteins’. Their light-induced
fluorescence
spectra are variable, depending considerably on external conditions. Current work studies a dependence of light-induced
fluorescence
spectra of discharged photoproteins obelin, aequorin, and clytin on excitation energy. It was demonstrated that photoexcitation to the upper electron-excited states (260–300 nm) of the discharged photoproteins initiates a
fluorescence
peak in the near UV region, in addition to the blue-green emission. To characterize the UV
fluorescence
, the light-induced
fluorescence
spectra of coelenteramide (CLM), fluorophore of the discharged photoproteins, were studied in methanol solution. Similar to photoproteins, the CLM spectra depended on photoexcitation energy; the additional peak (330 nm) in the near UV region was observed in CLM
fluorescence
at higher excitation energy (260–300 nm). Quantum chemical calculations by time depending method with B3LYP/cc-pVDZ showed that the conjugated pyrazine-phenolic fragment and benzene moiety of CLM molecule are responsible for the additional UV
fluorescence
peak. Quantum yields of CLM
fluorescence
in methanol were 0.028 ± 0.005 at 270–340 nm photoexcitation. A conclusion was made that the UV emission of CLM might contribute to the UV
fluorescence
of the discharged photoproteins. The study develops knowledge on internal energy transfer in biological structures – complexes of proteins with low-weight aromatic molecules. © 2016 Elsevier B.V.
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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, Russian Federation
Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Alieva, R. R.; Tomilin, F. N.; Томилин, Феликс Николаевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Kudryasheva, N. S.
}
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16.
A quantum chemical
study of the formation of 2-hydroperoxy-coelenterazine in the Сa2+-regulated photoprotein obelin / L. Y. Antipina [et al.]> // J. Struct. Chem. - 2011. -
Vol. 52
,
Is. 5
. - P. 870-875. - Cited References: 19. - The work was supported by RFBR (07-04-00930-a), the "Molecular and Cell Biology" Program of the Presidium of the Russian Academy of Sciences, and the Program of the Siberian Division of the Russian Academy of Sciences (project No. 2) within the implementation of the Federal Targeted Program "Scientific and Scientific Pedagogical Personnel of Innovative Russia, 2010" (P333 and P213). . - ISSN 0022-4766
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
CALCIUM-DISCHARGED OBELIN
SEMIEMPIRICAL METHODS
1.7 ANGSTROM
OPTIMIZATION
PARAMETERS
MECHANISM
FLUORESCENCE
ELEMENTS
PROTEIN
EMITTER
Кл.слова (ненормированные):
coelenterazine
--
2-hydroperoxy-coelenterazine
--
Obelia longissima
--
Renilla muelleri
Аннотация:
The Ca2+-regulated photoprotein obelin determines the luminescence of the marine hydroid Obelia longissima. Bioluminescence is initiated by calcium and appears as a result of the oxidative decarboxylation related to the coelenterazine substrate. The luciferase of the luminescent marine coral Renilla muelleri (RM) also uses coelenterazine as a substrate. However, three proteins are involved in the in vivo bioluminescence of these animals: luciferase, green fluorescent protein, and Ca2+-regulated coelenterazine-binding protein (CBP). In fact, CBP that contains one strongly bound coelenterazine molecule is the RM luciferase substrate in the in vivo bioluminescent reaction. Coelenterazine becomes available for oxygen and the reaction with luciferase only after binding CBP with calcium ions. Unlike Ca2+-regulated photoproteins, the coelenterazine molecule is not activated by oxygen in the CBP molecule. In this work, by means of quantum chemical methods the behavior of substrates in these proteins is analyzed. It is shown that coelenterazine can form different tautomers: CLZ(2H) and CLZ(7H). The formation of 2-hydroperoxy-coelenterazine is studied. According to the obtained data, these proteins use different forms of the substrates for the reaction. In obelin, the substrate is in the CLZ(2H) form that affords hydrogen peroxide. In RM, coelenterazine is in the CLZ(7H) form, and therefore, CBP is not activated by oxygen.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk, Russia
Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk, Russia
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia
Доп.точки доступа:
Antipina, L. Yu.; Tomilin, F. N.; Томилин, Феликс Николаевич; Vysotski, E. S.; Высоцкий, Евгений Степанович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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17.
Laser photolysis of
fluorone dyes in a chitosan matrix / E. A. Slyusareva [et al.]> // Quantum Electron. - 2012. -
Vol. 42
,
Is. 8
. - P. 687-692,
DOI
10.1070/QE2012v042n08ABEH014860. - Cited References: 32 . - ISSN 1063-7818
РУБ
Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
POLY(VINYL ALCOHOL) MATRIX
XANTHENE DYES
ROSE-BENGAL
FLUORESCENCE
PROPERTIES
DELAYED
FLUORESCENCE
ORGANIC-MOLECULES
TRIPLET-STATE
EXCITATION
ABSORPTION
PHOSPHORESCENCE
Кл.слова (ненормированные):
laser photolysis
--
fluorescein
--
dibromofluorescein
--
eosin Y
--
erythrosin B
--
Rose Bengal
--
chitosan
--
photobleaching kinetics
--
two-step absorption
Аннотация:
Kinetics of laser-induced photobleaching of fluorone dyes (fluorescein, dibromofluorescein, eosin Y, erythrosin B, Rose Bengal) is studied in a chitosan matrix. For all dyes the bleaching kinetics at the intensities of laser radiation 0.7 — 11.9 W cm-2 demonstrates quasi-monomolecular behaviour. The results are analysed using a kinetic model, based on the four-level (S0, S1, T1, Tn) scheme of the dye with chemically active triplet states taken into account. It is shown that the rate constants of the chemical reaction involving higher triplet states in the dyes studied amount to (3.9 — 18.6) × 106 s-1 and exceed the analogous values for the reaction involving the first lower triplet states by nine orders of magnitude. The rate of reaction involving the first triplet states appeared to be higher by one — two orders of magnitude than that in the case of higher triplet states involved because of low population of the latter. The possible mechanism of dye bleaching with participation of chitosan that consists in reduction of the dye to the leuco form by transfer of hydrogen from the chitosan matrix is discussed.
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Публикация на русском языке
Лазерный фотолиз флуороновых красителей в хитозановой матрице [Текст] / Е. А. Слюсарева [и др.] // Квант. электроника : Физический институт им. П.Н.Лебедева РАН, 2012. - Т. 42 № 8. - С. 687-692
Держатели документа:
[Slyusareva, E. A.
Sizykh, A. G.
Gerasimova, M. A.
Slabko, V. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Myslivets, S. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Slyusareva, E. A.; Sizykh, A. G.; Gerasimova, M. A.; Slabko, V. V.; Слабко, Виталий Васильевич; Myslivets, S. A.; Мысливец, Сергей Александрович
}
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18.
The effect of
halogen substitution on the structure and electronic spectra of fluorone dyes / E. A. Slyusareva [et al.]> // Opt. Spectrosc. - 2012. -
Vol. 112
,
Is. 5
. - P. 671-678,
DOI
10.1134/S0030400X12040194. - Cited References: 44. - This work was supported by the FTsP Kadry GK-P333 and by the Siberian Branch of the Russian Academy of Sciences (Integration project no. 2). We are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences (Moscow) and to the Complex of High-Performance Computations of the IKIT of Siberian Federal University. E. A. Slyusareva acknowledges support from the German Academic Exchange Service and the Ministry of Education and Science of the Russian Federation (the program "Mikhail Lomonosov II") of scientific research at the University of Regensburg and in the Helmholtz Center in Berlin (Germany). . - ISSN 0030-400X
РУБ
Optics + Spectroscopy
Рубрики:
POLARIZABLE CONTINUUM MODEL
BORIC-ACID GLASS
XANTHENE DYES
FLUORESCEIN DERIVATIVES
DELAYED
FLUORESCENCE
EOSIN-Y
ABSORPTION
PHOSPHORESCENCE
TRANSITIONS
EXCITATION
Аннотация:
By means of the B3LYP density functional method with the use of the polarized continuum model PCM, we have performed quantum-chemical computations of the electronic absorption and
fluorescence
spectra of fluorone dianions: fluorescein, dibromofluorescein, eosin, erythrosine, and Rose Bengal in vacuum and methanol. We have revealed conformational features of the structure of fluorone dianions (charge redistribution, changes in the bond lengths and angles between bonds) second by the halogen substitution, the transition from the ground state to an excited state, and the change of the solvent (vacuum-methanol). Absorption and
fluorescence
wavelengths, constant dipole moments, transition dipole moments, and oscillator strengths have been calculated. We have showed that, upon halogenation of fluorones, the absorption spectra are redshifted and the Stokes shift decreases, which is qualitatively consistent with experimental results.
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Публикация на русском языке
Влияние галогензамещения на структуру и электронные спектры флуороновых красителей [Текст] / Е. А. Слюсарева [и др.] // Оптика и спектроскопия : Наука, 2012. - Т. 112 № 5. - С. 729-737
Держатели документа:
[Slyusareva, E. A.
Tomilin, F. N.
Sizykh, A. G.
Tankevich, E. Yu.
Kuzubov, A. A.
Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Tomilin, F. N.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Slyusareva, E. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Sizykh, A. G.; Tankevich, E. Y.; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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19.
AVERYANOV, E. M.
POLARIZED LUMINESCENCE SPECTRUM OF IMPURITY LIQUID-CRYSTAL - THE DEGENERATION LIFTED AND RENEWED BY RELAXATION / E. M. AVERYANOV> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. -
Vol. 103
,
Is. 6
. - P. 2018-2038. - Cited References: 45 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
Рубрики:
RESOLVED
FLUORESCENCE
DEPOLARIZATION
UNIAXIAL MOLECULAR SAMPLES
NEMATIC ORDER PARAMETERS
EXCITED-STATES
SPECTROSCOPY
MEMBRANES
FLUOROPHORES
ORIENTATION
TRANSITION
DYES
Аннотация:
The general molecular-statistical approach is proposed for the analysis or the polarized luminescence spectrum for impurity molecule of an arbitrary symmetry in the nematic liquid crystal matrix. On the particular example of uniaxial molecules the influence of features of the molecular electron structure, orientational statistics, molecular dynamics, and features of the anisotropic intermolecular coupling upon the positions of maxima v(if)(t) of impurity
fluorescence
polarized bands J(ij)(t) is studied. For the first time it is shown that all these factors significantly affect the degree of spectrum v(ij)(t) degeneration. For t not-equal 0, relaxation of excited impurity molecule subsystem toward the orientational distribution lifts a partial degeneration of spectrum v(ij), occuring at t not-equal 0, and renews partial or total degeneration of spectrum v(ij) in the limit t = infinity. In the lack of the spectrum v(ij) degeneration for t = 0 the relaxation may restore partial degeneration for t not-equal 0 as a function of the features of electron structure of molecules. The results of work explain the familiar experimental data on the number of independent component v(ij) and relation between them, on dependence of v(ij) upon the order of matrix and impurity subsystem, on the mutual relation in the positions of impurity band polarized component in the absorption and
fluorescence
spectra.
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20.
Averyanov, E. M.
New features in the structural relaxation of a nematic liquid-crystal doped with luminescent impurity molecules / E. M. Averyanov, V. A. Gunyakov> // JETP Letters. - 1993. -
Vol. 57
,
Is. 8
. - P. 492-496. - Cited References: 15 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
FLUORESCENCE
DEPOLARIZATION
ORIENTATIONAL RELAXATION
FLUOROPHORES
Аннотация:
A new approach is proposed for interpreting the polarized
fluorescence
spectra of an impure liquid crystal in which the orientational order of excited impurity molecules has undergone relaxation. This approach has also been realized experimentally. The new experimental data demonstrate a new relaxation process with a time scale on the order of 10(-11)-10(-9) s.
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Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Аверьянов, Евгений МихайловичAver'yanov
}
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