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    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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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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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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    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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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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    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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AVERYANOV, E. M.
STATIONARY SPECTRUM OF ADMIXED LIQUID-CRYSTAL POLARIZED FLUORESCENCE / E. M. AVERYANOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1994. - Vol. 106, Is. 3. - P. 767-779. - Cited References: 29 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
LOCAL FIELD
   SPECTROSCOPY
   PARAMETERS
   DYES

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Averyanov, E. M.
Splitting of polarized impurity fluorescence bands in the steady-state spectrum of an isotropic solution / E. M. Averyanov // JETP Letters. - 1994. - Vol. 59, Is. 1. - P. 23-26. - Cited References: 12 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
RELAXATION
Аннотация: A difference is predicted between the peaks, nu(VV) and nu(VH), Of the polarized components J(VV)(nu) and J(VH)(nu) in the steady-state spectrum of impurity fluorescence in an isotropic solution. This difference would result from a temporal correlation between an orientational Brownian diffusion of excited fluorescing molecules and a structural relaxation of the surrounding matrix molecules.

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Аверьянов, Евгений МихайловичAver'yanov
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    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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Raman scattering and phase transitions in fluorides with elpasolite structure / A. Vtyurin [et al.] // Ferroelectrics : Proceedings of the Joint International Symposium. - 2017. - Vol. 512, Is. 1. - P. 58-64, DOI 10.1080/00150193.2017.1349863. - Cited References: 22 . - ISSN 0015-0193
Кл.слова (ненормированные):
Ferroelectric materials -- Ferroelectricity -- Elpasolite -- First-order phase transitions -- Fluorescence process -- Raman lines -- Raman scattering spectra -- Temperature phase -- Temperature range -- Raman scattering
Аннотация: Raman scattering spectra of Rb2KHoF6 and Rb2KDyF6 crystals have been studied in temperature range from 20 K to 399 K and from 7 K to 500 K respectively. Raman spectra of Rb2KHoF6 crystal are distorted due to the fluorescence process. Parameters of Raman lines have been quantitatively analyzed. The investigation points to the considerable role of CX6 groups in the temperature phase transition in Rb2KHoF6 and Rb2KDyF6 crystals. The anomalies of spectra changes with temperature testify the first order phase transitions in these crystals. © 2017 Taylor & Francis Group, LLC.

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Доп.точки доступа:
Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Voronov, V. N.; Воронов, Владимир Николаевич; Krylova, S. N.; Крылова, Светлана Николаевна; Joint Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(13 ; 2016 ; June 19-24 ; Matsue, Japan); International Workshop on Relaxor Ferroelectrics(8 ; June 19-24, 2016 ; Matsue, Japan)
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10.

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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