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1.
Aver'yanov, E. M.
Mean polarizability of
molecules
and anisotropy of the Lorentz tensor upon a nematic-smectic a phase transition: Their behavior in a homologous series / E.M. Aver'yanov> // Russ. J. Phys. Chem. A. - 2012. -
Vol. 86
,
Is. 5
. - P. 720-728,
DOI
10.1134/S0036024412050044. - Cited References: 37 . - ISSN 0036-0244
РУБ
Chemistry, Physical + Anisotropy +
Molecules
+ Phase transitions + Tensors
Рубрики:
CHOLESTERIC LIQUID-CRYSTALS
REFRACTIVE-INDEX DATA
A PHASE
MESOMORPHIC PROPERTIES
ORIENTATIONAL ORDER
OPTICAL ANISOTROPY
LOCAL-FIELD
POLYMORPHISM
TEMPERATURE
A-monotone
Alkyl chain
Experimental values
Homologous series
Homologues
Limiting values
Lorentz
Mesophases
Molecular core
Molecular polarizabilities
Nematic
Orientational order parameters
Polarizabilities
Polarizability density
Quadratic dependence
A-monotone
Smectic
Smectic phase
Smectic phasis
Smectic-A phasis
Кл.слова (ненормированные):
molecular polarizability
--
anisotropy
--
phase transition
--
nematic
--
smectic
--
homologues
Аннотация:
Experimental values of the mean polarizability of
molecules
, (gamma) over bar, and components of the Lorentz tensor, L-j, in the nematic and smectic A phases are obtained for a homologous series of n-alkyl-p-(4-ethoxybenzylideneamino)-alpha-methylcinnamates. Dependences of the (gamma) over bar and L-j values on the mesophase temperature, the orientational order parameter S of
molecules
, and the number n in the homologous series are revealed. The quadratic dependence of (gamma) over bar (S) in the nematic and smectic phases is established that is invariant with respect to the nematic-smectic A transition. Polarizability densities of the molecular core and the alkyl chain are found from the monotone decreasing dependence (gamma) over bar (n)/v (where v is volume per one molecule) in the smectic phase. The presence (or absence) of the odd-even alternation of L-j(n) in the nematic (smectic) phase is shown. A monotone decrease in the Lorentz tensor anisotropy L with an increase in n is revealed in the smectic phase, and limiting values L-j(n -> infinity) are determined.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Изменение средней поляризуемости молекул и анизотропии тензора Лорентца при фазовом переходе нематик – смектик А и в гомологическом ряду [Текст] / Е.М. Аверьянов // Журн. физ. химии : Наука, 2012. - Т. 86 № 5. - С. 810-818
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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2.
Аверьянов, Евгений Михайлович
.
Влияние нематического и смектического порядка на поляризуемость молекул жидкого кристалла этил-p-(4-этоксибензилиденамино-)α-метилциннамата / Е.М. Аверьянов> // Физ. тверд. тела. - 2013. -
Т. 55
,
вып. 11
. - С. 2271-2275 . - ISSN 0367-3294
Аннотация:
Получены экспериментальные значения компонент тензора поляризуемости gamma молекул жидкого кристалла этил-p-(4-этоксибензилиденамино-)α-метилциннамата в нематической и смектической A фазах. Установлены квадратичные зависимости продольнойϒl и поперечной ϒt компонент, среднего значения Ῡ и анизотропии Δϒ поляризуемости в обеих фазах от параметра ориентационного порядка молекул S при максимально широком интервале изменения S. Фазовый переход нематик-смектик A с непрерывным изменением S проявляется в виде изломов на линейных зависимостях величин Ῡ, Δϒ, ϒl от S[[p]]2[[/p]] и не влияет на зависимость ϒt(S[[p]]2[[/p]]). Дан вывод наблюдаемых зависимостей в рамках теории перехода нематик-смектик A. Выяснены причины различного влияния ориентационного и позиционного упорядочения молекул на параметры поляризуемости.
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Переводная версия
Influence of nematic and smectic orders on polarizability of
molecules
of ethyl-p-(4-ethoxybenzylideneamino-)alpha-methyl cinnamate liquid crystals. - [Б. м. : б. и.]
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Aver'yanov, E. M.
}
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3.
Аверьянов, Евгений Михайлович
.
Изменение поляризуемости молекул МВВА при переходе нематик-изотропная жидкость и физические следствия / Е.М. Аверьянов> // Физ. тверд. тела. - 2013. -
Т. 55
,
вып. 10
. - С. 2020-2025 . - ISSN 0367-3294
Аннотация:
Получены экспериментальные значения компонент Lj и ϒj тензоров Лорентца и поляризуемости молекул жидкого кристалла 4-метоксибензилиден-4'-бутиланилина (МВВА) в нематической и изотропной фазах. Установлены квадратичные зависимости среднего значения Ῡ(S) и анизотропии Δϒ(S) поляризуемости в нематической фазе от параметра ориентационного порядка молекул S. В рамках феноменологического подхода дан вывод зависимостей Ῡ(S), Δϒ(S) и объяснены их особенности для МВВА и других известных объектов. Выяснена связь зависимостей Ῡ(S), Δϒ(S) с особенностями фазового перехода нематик-изотропная жидкость.
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Переводная версия
Change in the polarizability of MBBA
molecules
upon the nematic-isotropic liquid transition and physical consequences. - [Б. м. : б. и.]
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Aver'yanov, E. M.
}
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4.
Aver'yanov, E. M.
Change in the polarizability of MBBA
molecules
upon the nematic-isotropic liquid transition and physical consequences / E. M. Aver'yanov> // Phys. Solid State. - 2013. -
Vol. 55
,
Is. 10
. - P. 2136-2141,
DOI
10.1134/S106378341310003X . - ISSN 1063-7834
Аннотация:
The Lorentz tensor components Lj and the polarizability tensor components ?j of 4-methoxyben-zylidene-4?-butylaniline (MBBA) liquid crystal
molecules
in nematic and isotropic phases have been determined experimentally. The quadratic dependences of the mean value ?(S) and anisotropy ??(S) of the polarizability in the nematic phase on the orientational order parameter S of
molecules
have been established. Within the phenomenological approach, the dependences ?(S) and ??(S) have been derived, and their features for MBBA and other known objects have been interpreted. The relation of the dependences ?(S) and ??(S) to the features of the nematic-isotropic liquid phase transition has been found. В© 2013 Pleiades Publishing, Ltd.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Изменение поляризуемости молекул МВВА при переходе нематик-изотропная жидкость и физические следствия / Е. М. Аверьянов // Физика твердого тела. - 2013. - Т. 55, вып. 10. - С. 2020-2025
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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5.
Mironov, V. L.
Multirelaxation generalized refractive mixing dielectric model of moist soils / V. L. Mironov, P. P. Bobrov, S. V. Fomin> // IEEE Geosc. Remote Sens. Letters. - 2013. -
Vol. 10
,
Is. 3
. - Ст. 6332477. - P. 603-606,
DOI
10.1109/LGRS.2012.2215574 . - ISSN 1545-598X
Перевод заглавия:
Многорелаксационная обобщенная рефракционная диэлектрическая модель влажных почв
Кл.слова (ненормированные):
Bound soil water
--
dielectric model
--
dielectric relaxations
--
dielectric spectra
--
free soil water
--
moist soil
--
Bound waters
--
Complex dielectric constant
--
Debye relaxation
--
Dielectric models
--
Dielectric spectra
--
Dipole relaxation
--
Frequency ranges
--
Gigahertz frequencies
--
Gigahertz range
--
Moist soil
--
Soil water
--
Spectroscopic parameters
--
Water molecule
--
Dielectric relaxation
--
Mixing
--
Molecules
--
Soil moisture
--
Geologic models
Аннотация:
In this letter, a multirelaxation generalized refractive mixing dielectric model (GRMDM) for moist soil is proposed and substantiated in the frequency range from 0.04 to 26.5 GHz. This model is based on the methodology of a single-relaxation GRMDM which accounts only for the dipole relaxation of water
molecules
in the gigahertz frequency range. The proposed multirelaxation GRMDM takes into account both the dipole (Debye) and ionic (Maxwell-Wagner) relaxations of soil water
molecules
. For this purpose, it uses a two-frequency Debye relaxation equation for the dielectric spectra of bound water. The spectroscopic parameters of the multirelaxation GRMDM were derived by fitting the spectra calculated by this model to the respective measured ones. The main advantage of this model is that it predicts the complex dielectric constant of moist soils throughout the megahertz and gigahertz frequency ranges with the same error as the single-relaxation GRMDM does only in the gigahertz range.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Omsk State Pedag Univ, Omsk 644099, Russia
Доп.точки доступа:
Bobrov, P. P.; Fomin, S. V.; Фомин, Сергей Викторович; Миронов, Валерий Леонидович
}
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6.
Aver'yanov, E. M.
Influence of nematic and smectic orders on polarizability of
molecules
of ethyl-p-(4-ethoxybenzylideneamino-)alpha-methyl cinnamate liquid crystals / E. M. Aver'yanov> // Phys. Solid State. - 2013. -
Vol. 55
,
Is. 11
. - P. 2391-2396,
DOI
10.1134/S1063783413110048. - Cited References: 16 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
TRANSITION
MBBA
Аннотация:
Experimental values of the polarizability tensor gamma components of
molecules
of ethyl-p-(4-ethoxybenzylideneamino-)alpha-methyl cinnamate liquid crystals in the nematic and smectic A phases have been obtained. Quadratic dependences of the longitudinal, gamma (l) , and transverse, gamma (t) , components, the mean value , and anisotropy Delta gamma in both phases have been established as functions of the orientational order parameter S of
molecules
in a maximally wide range of S. The nematic-smectic A phase transition with a continuous variation of S manifests itself as kinks in the linear dependences of , Delta gamma, and gamma (l) on S (2) and does not influence the dependence gamma (t) (S (2)). The observed dependences have been derived in the framework of the theory of the nematic-smectic A phase transition. The factors responsible for different influences of the orientational and positional orderings of
molecules
on the polarizability parameters have been determined.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Влияние нематического и смектического порядка на поляризуемость молекул жидкого кристалла этил-p-(4-этоксибензилиденамино-)α-метилциннамата / Е. М. Аверьянов // Физика твердого тела. - 2013. - Т. 55, вып. 11. - С. 2271-2275
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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7.
Gerasimova, J. V.
Evans hole in internal modes IR spectrum of WO3F33-ions in (NH4)(3)WO3F3 crystal / J. V. Gerasimova, A. N. Vtyurin> // Chem. Phys. Lett. - 2012. -
Vol. 523
. - P. 144-147,
DOI
10.1016/j.cplett.2011.12.041. - Cited References: 11. - We would like to thank Prof. E. M. Aver'yanov for discussion, and V. A. Ouskin for the technical assistance. This work has been supported by the Russian Foundation for Basic Researches, Grant No. 11-02-98002-r_sibir_a. . - ISSN 0009-2614
РУБ
Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
INFRARED-SPECTRA
PHASE-TRANSITIONS
OXYFLUORIDE
MOLECULES
Аннотация:
Infrared absorption of (NH4)(3)WO3F3 compound has been studied. Profile of asymmetric band in 600-1000 cm (1) range associated with polar W-O vibrations of WO3F33- ions is explicable on the basis of multi-oscillatory dynamics with account of damping. Complex profile with Evans holes proves that internal modes of WO3F33- anions in the fluorine-oxygen octahedron interact due to the effects of the local field. (C) 2011 Elsevier B. V. All rights reserved.
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Держатели документа:
[Gerasimova, Ju V.
Vtyurin, A. N.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Vtyurin, A. N.; Втюрин, Александр Николаевич; Герасимова, Юлия Валентиновна
}
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8.
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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9.
Aver'yanov, E. M.
New features of a smectic-A-crystal-B phase transition in a homologous series of liquid crystals / E. M. Aver'yanov> // JETP Letters. - 2014. -
Vol. 99
,
Is. 3
. - P. 158-163,
DOI
10.1134/S0021364014030047. - Cited References: 21 . - ISSN 0021-3640. - ISSN 1090-6487
РУБ
Physics, Multidisciplinary
Рубрики:
POLARIZABILITY
POLYMORPHISM
ANISOTROPY
MOLECULES
BEHAVIOR
Аннотация:
The components L j of the Lorentz tensor and the polarizability density of
molecules
G in the smectic-A and crystalline-B phases have been determined for homologues of the series of alkyl-p-(4-alkoxybenzylideneamino-)cinnamates. The quantity L j (G) in both phases is a linear (quadratic) function of the orientational order parameter of
molecules
S, which is invariant (noninvariant) with respect to the A-B transition, which is manifested in the form of jumps δL j and δG and enhancement of the G(S) dependence. An increase in the length of terminal molecular chains and weakening of interlayer correlation of
molecules
are accompanied by strengthening of the A-B transition of the first order and G(S) dependences in both phases together with an increase in δL j and δG. Change δG and dependence G(S) in the B phase are related to change in the conformation (flattening) of aromatic molecular cores.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Новые особенности фазового перехода смектик-A-кристалл-B в гомологическом ряду жидких кристаллов [Текст] / Е. М. Аверьянов // Письма в Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 99 Вып. 3-4. - С. 179-184
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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10.
Aver'yanov, E. M.
Orientational order and polarizability of
molecules
in a nematic liquid crystal / E. M. Aver'yanov> // Phys. Solid State. - 2014. -
Vol. 56
,
Is. 5
. - P. 1058-1063,
DOI
10.1134/S1063783414050035. - Cited References: 17 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
NORMAL-BUTYLANILINE MBBA
INTERNAL-ROTATION
TRANSITION
PHASE
Аннотация:
The influence of the orientational order of
molecules
in a nematic liquid crystal on the mean value ?? and anisotropy ?? of the molecular polarizability has been studied in the framework of the molecular statistical approach with allowance for the perturbation of the electronic structure of
molecules
due to the change in the conformation of their aromatic core and intermolecular interactions. Experimental dependences of ?? and ?? on the molecular orientational order parameter S have been derived, and their specific features for the known objects have been explained. The possibility of separating the contributions of opposite signs to the dependence ??(S) due to the change in the conformation of
molecules
and intermolecular interactions has been shown using nematic MBBA as an example. © 2014 Pleiades Publishing, Ltd.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Ориентационный порядок и поляризуемость молекул в нематическом жидком кристалле [Текст] / Е. М. Аверьянов // Физ. тверд. тела. - 2014. - Т. 56 Вып. 5.- P.1019-1023
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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11.
Aver'yanov, E. M.
Structural and thermodynamic consequencies of the interaction of conformational degrees of freedom of azomethines in the nematic phase / E. M. Aver'yanov> // J. Struct. Chem. - 2014. -
Vol. 55
,
Is. 4
. - P. 605-611,
DOI
10.1134/S0022476614040039. - Cited References: 21 . - ISSN 0022-4766. - ISSN 1573-8779
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
CONJUGATED POLY(AZOMETHINE)S
TERMINAL SUBSTITUENTS
ELECTRONIC-STRUCTURES
FLUORINATED ANALOGS
INTERNAL-ROTATION
MOLECULES
COMPOUND
ANGLES
STATE
NMR
Кл.слова (ненормированные):
azomethines
--
benzylideneaniline
--
conformation
--
steric effects of substituents
--
nematic-isotropic liquid transition
--
conformational polymorphism
Аннотация:
The interaction of the conformational degrees of freedom of azomethines in the nematic phase, which is induced by electronic donor-acceptor properties of the terminal substituents of the benzylideneaniline core is studied. These degrees of freedom related to the rotation angles phi (k) around the bonds between the substituent and the aniline ring (phi(1)) and also between the CH=N bridge and the aniline ring (omega(2)) are characterized by the parameters Q (k) = aOE (c) cos(2)phi (k) >. It is found that the interaction of these degrees of freedom is manifested in the linear dependence Q (2)(Q (1)). Within the phenomenological theory the effect of this interaction on changes delta (k) in the Q (k) values during the nematic liquid crystal-isotropic liquid phase transition is revealed along with the temperature T (NI) and character of this transition. The derivation of previously established empirical dependences T (NI)(Q (k) ) is presented in the presence of direct and indirect steric effects of side substituents affecting the Q (k) values. A diverse combination of delta (k) signs in the nematic phase, which is a prerequisite for the conformational polymorphism of the nematic phases of azomethines, is shown.
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Аверьянов, Евгений Михайлович. Структурные и термодинамические следствия взаимодействия конформационных степеней свободы азометинов [Текст] / Е. М. Аверьянов // Журн. структ. химии. - Новосибирск : Изд-во СО РАН, 2014. - Т. 55 № 4. - С. 641 - 647
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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12.
Heat-induced transformations in
coronene - Single-walled carbon nanotube systems / A. I. Chernov [et al.] ; International Workshop on Nanocarbon Photonics and Optoelectronics)> // J. Nanophoton. - 2016. -
Vol. 10
,
Is. 1
: Special Section on Nanocarbon Photonics and Optoelectronics. - Ст. 012504,
DOI
10.1117/1.JNP.10.012504. - Cited References: 14 . - ISSN 1934-2608
РУБ
Nanoscience & Nanotechnology + Optics
Рубрики:
Graphene nanoribbons
Encapsulation
Reactor
Кл.слова (ненормированные):
graphene nanoribbons
--
coronene
molecules
--
coronene stacks
--
columns
--
single-walled carbon nanotubes
--
nanoreactor
Аннотация:
Coronene
molecules
are used as filler for single-walled carbon nanotubes. Variation of the synthesis temperature regimes leads to formation of different types of carbon nanostructures inside the nanotubes. Accurate determination of the structures by optical spectroscopy methods remains an important issue in composite materials. Clear distinction between adsorbed organic
molecules
on the surface of the tubes and filled structures may be accessed by Raman and photoluminescence spectroscopies. We perform additional heat treatment after the initial synthesis procedure and show the evolution of the optical spectral features corresponding to the filled structures and adsorbed materials on the surface of single-walled carbon nanotubes. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).
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Доп.точки доступа:
Chernov, A. I.; Fedotov, P. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Obraztsova, E. D.; International Workshop on Nanocarbon Photonics and Optoelectronics (4th ; 28 July - 1 August, 2014 ; Polvijärvi, North Karelia, Finland)
}
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13.
Action of the
atomic and electronic structure of pheromone
molecules
on the effectiveness of communication in xylophagous insects / P. V. Artyushenko [et al.]> // J. Struct. Chem. - 2016. -
Vol. 57
,
Is. 2
. - P. 287-293,
DOI
10.1134/S0022476616020074. - Cited References:27. - This work was supported by RFBR projects Nos. 13-04-00375 and16-04-00132. . - ISSN 0022-4766. - ISSN 1573-8779
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Monochamus-galloprovincialis coleoptera
Density-functional theories
Beetle Ips-typographus
Pine sawyer beetle
Aggregation pheromone
Cerambycidae
Attraction
Components
Attack
Set
Кл.слова (ненормированные):
atomic and electronic structure
--
functional density methods
--
absorption
--
spectra
--
excited states
--
xylophages
--
pheromones
Аннотация:
The B3LYD /6-31(p,d) density functional method is applied to pheromones of the forest xylophagous insects Ips typographus L., Monochamus urussovi Fisch., and Monochamus galloprovincialis Oliv. to calculate the absorption spectra and find excited states. The calculated results are used to assess the possible activity of the
molecules
when they are affected by solar radiation.
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Публикация на русском языке
Влияние атомной и электронной структуры молекул феромонов на эффективность коммуникации насекомых-ксилофагов [Текст] / П. В. Артюшенко [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 304-310
Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, KSC Presidium, Int Res Ctr Studies Extreme States Organism, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk, Russia.
Доп.точки доступа:
Artyushenko, P. V.; Артюшенко, Полина Владимировна; Tomilin, F. N.; Томилин, Феликс Николаевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.; RFBR [13-04-00375, 16-04-00132]
}
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14.
Aver'yanov, E. M.
Local-Field Anisotropy of a Light Wave in Quasi-Two-Dimensional Soft-Matter Objects / E. M. Aver'yanov> // J. Exp. Theor. Phys. - 2010. -
Vol. 110
,
Is. 4
. - P. 622-636,
DOI
10.1134/S1063776110040102. - Cited References: 73. - This study was supported by the Presidium of the Russian Academy of Sciences within the Program of Basic Research (project no. 27.1) and the Siberian Branch of the Russian Academy of Sciences within the Program of Interdisciplinary Basic Research (project no. 5). . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
INTEGRATED OPTICAL TECHNIQUES
LANGMUIR-BLODGETT-FILMS
SMECTIC LIQUID-CRYSTALS
UNIAXIAL POLYMER-FILMS
MOLECULAR-ORIENTATION
INTERNAL FIELD
DIELECTRIC-CONSTANT
SPECTRAL FEATURES
REFRACTIVE-INDEX
THIN-FILMS
Кл.слова (ненормированные):
Anisotropic films
--
Bilayer lipid membrane
--
Chemical structure
--
Comblike polymers
--
Conductive Polymer
--
Discotics
--
Dispersion of refractive index
--
Experimental data
--
Experimental values
--
Hexatic-B phase
--
Isotropization
--
Langmuir films
--
Light wave
--
Lorentz
--
Macromolecular polymers
--
Model approach
--
Molecular polarizabilities
--
Optical axis
--
Order parameter
--
Orientational order parameters
--
Orientational orderings
--
Orientational orders
--
Smectic layers
--
Smectic-A
--
Smectics
--
Soft matter
--
Structural unit
--
Sub-micron films
--
Substrate types
--
Tensor components
--
Visible range
--
Anisotropy
--
Cell membranes
--
Conductive plastics
--
Conjugated polymers
--
Electronic structure
--
Light measurement
--
Liquid crystal polymers
--
Molecules
--
Multilayer films
--
Organic polymers
--
Phase transitions
--
Polarization
--
Polymers
--
Refractive index
--
Substrates
--
Tensors
--
Two dimensional
--
Conductive films
Аннотация:
Experimental values of the Lorentz tensor components L-j for uniaxial quasi-two dimensional "soft matter" objects on substrates (bilayer lipid membranes, multilayer Langmuir films, smectics A, hexatic smectics B, submicron films of discotics Col(hd), micron anisotropic films of liquid-crystal comblike polymers and macromolecular polymers, submicron films of conjugated conductive polymers), freely suspended sub-micron films of smectics A, and uniaxially stretched micron films of conjugated conductive polymers have been determined using dispersion of refractive indices in the visible range. The dependences of the components L-j on the type of orientation (axial, planar) of uniaxial
molecules
(structural units of the film) with respect to the optical axis of the film, the film thickness, the substrate type, the chemical structure of
molecules
, and their long-range orientational order are established. It is revealed that the smectic A-hexatic B phase transition and two-dimensional crystallization of the smectic layer lead to changes in the components L-j due to the change in the orientational ordering of
molecules
as a result of the relation between the orientational and hexatic order parameters. All the above objects are characterized by isotropization of the Lorentz tensor L and the local-field tensor f with a simultaneous decrease in the birefringence of the sample and in the anisotropy of the molecular polarizability due to the change in the electronic structure of
molecules
. The correction for the anisotropy of the local-field tensor f to the orientational order parameter or the anisotropy of the molecular polarizability increases. The existing model approaches to calculating the components L-j for the objects under consideration are compared with the experimental data.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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15.
Aver'yanov, E. M.
Nonlinear coupling between the mean polarizability (gamma)over-bar of
molecules
and the local-field anisotropy in a liquid crystal and change of the "(gamma)over-bar = const" paradigm / E. M. Aver'yanov> // JETP Letters. - 2008. -
Vol. 87
,
Is. 5
. - P. 258-261 ; JETP Letters. - 2008. -
Vol. 87
,
Is. 5
. - P. 258-261,
DOI
10.1134/S002136400805007X. - Cited References: 14 . - ISSN 0021-3640. - Вариант Sopus
РУБ
Physics, Multidisciplinary
Рубрики:
REFRACTIVE-INDEXES
ORDER
Аннотация:
The nonlinear relation between the mean effective polarizability (gamma) over bar of
molecules
and the local-field anisotropy in uniaxial liquid crystals is demonstrated. Stringent constraints on (gamma) over bar from below, indicative of the dependence of on the liquid-crystal state and the change of the "(gamma) over bar = const" paradigm, are established. The theoretical results are confirmed by experiments with nematic liquid crystals having high and low birefringences.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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16.
Aver'yanov, E. M.
Dimension of mesogenic
molecules
as atomic clusters / E. M. Aver'yanov> // Phys. Solid State. - 2005. -
Vol. 47
,
Is. 2
. - P. 378-389,
DOI
10.1134/1.1866424. - Cited References: 19 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
LIQUID-CRYSTAL CHEMISTRY
ORIENTATIONAL ORDER
TRANSITION
Аннотация:
The problem regarding the mass dimension D of mesogenic
molecules
as atomic clusters is formulated and solved using computer simulation and analytical calculations. For a large number of compounds belonging to different chemical classes, it is shown that the cores of discotic lacunar (rodlike, lathlike)
molecules
forming nematic or columnar discotic (calamitic) phases have a fractional dimension 1 D-c 2 (D-c approximate to 1). The dependences of the dimension D-c on the symmetry, the conformation, and the structural-chemical features of the molecular core are determined. It is demonstrated that, in the region of side flexible chains in
molecules
of both types, the dimension D-ch can be either smaller or larger than unity, depending on the chain conformation. An analytical expression accounting for the results of numerical experiments is obtained for the dimension D-ch. (C) 2005 Pleiades Publishing, Inc.
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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17.
Ground state and
phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface / A. F. Sadreev [et al.]> // J. Chem. Phys. - 2004. -
Vol. 120
,
Is. 2
. - P. 954-960,
DOI
10.1063/1.1631920. - Cited References: 38 . - ISSN 0021-9606
РУБ
Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR-DYNAMICS SIMULATION
HYDROGEN-BOND
MONOLAYERS
MODEL
GOLD
PEPTIDES
ALKANETHIOLS
ACTIVATION
FILMS
CYS
Кл.слова (ненормированные):
Gold
--
Ground state
--
Hydrogen bonds
--
Molecules
--
Phase transitions
--
Self assembly
--
Surfaces
--
Temperature
--
Arg-cysteamines
--
Crystal surface
--
Dipole moments
--
Dipole-dipole interactions
--
Molecular dynamics
Аннотация:
The translational and orientation order of arg-cysteamine
molecules
chemiabsorbed on the Au(111) crystal surface is considered. Couplings between carbon, nitrogen, and hydrogen atoms of the n-alkanethiols are approximated by the Lennard-Jones potential. Moreover, hydrogen bonds between oxygen and nitrogen and dipole-dipole interactions of the dipole moments of different atomic groups are taken into account. It is found that
molecules
are arranged in a 2x2 lattice and have the total symmetry C(6)xZ(2). The critical temperature of the phase transition to the tilted state T-c1, which breaks the symmetry C-6, is estimated to be extremely high. The spontaneous breakdown of the remaining symmetry Z(2) leads to the twisted state of the
molecules
and has the critical temperature T-c2=340 K. (C) 2004 American Institute of Physics.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-581 83 Linkoping, Sweden
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Sukhunin, Y. V.; Petoral, R. M.; Uvdal, K.
}
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18.
Aver'yanov, E. M.
Manifestations of the higher moments of the orientation distribution function of
molecules
in the spectral properties of an impurity nematic / E. M. Aver'yanov, V. G. Rumyantsev> // J. Exp. Theor. Phys. - 2004. -
Vol. 98
,
Is. 6
. - P. 1146-1151,
DOI
10.1134/1.1777627. - Cited References: 15 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
LIQUID-CRYSTAL
SCATTERING
PHASES
MATRIX
ORDER
DYES
Кл.слова (ненормированные):
Absorption
--
Band structure
--
Impurities
--
Molecular dynamics
--
Polarization
--
Spectrum analysis
--
Distribution function
--
Local field parameters
--
Splitting
--
Temperature dependence
--
Nematic liquid crystals
Аннотация:
The polarized electronic absorption spectra, orientation ordering, and the special local field features were studied for push-pull linear dye
molecules
with strong donor-acceptor electronic conjugation of terminal fragments in the matrix of a nematic liquid crystal. The temperature-induced inversion of the sign of the splitting of polarized impurity absorption bands was observed. This effect was shown to be caused by the statistical character of orientation ordering of impurity
molecules
and manifestation of the higher moments of the orientation distribution function. The dependence of local field parameters (Lorentz tensor components) of impurity
molecules
on their orientation ordering was established. This dependence was used to reproduce the temperature dependence of the orientation order parameter of the matrix. (C) 2004 MAIK "Nauka / Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Res Inst Organ Intermediates & Dyes, Dolgoprudnyi 141700, Moscow Oblast, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Research Institute of Organic Intermediates and Dyes, Dolgoprudnyi, Moscow oblast, 141700, Russian Federation
Доп.точки доступа:
Rumyantsev, V. G.; Аверьянов, Евгений Михайлович
}
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19.
Aver'yanov, E. M.
Fluctuations of orientational order in a uniaxial nematic liquid crystal with biaxial
molecules
and its response to an external field / E. M. Aver'yanov> // Phys. Solid State. - 2003. -
Vol. 45
,
Is. 5
. - P. 990-1001,
DOI
10.1134/1.1575350. - Cited References: 30 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
PHASE-TRANSITION
SMECTIC-A
PARTICLES
SYSTEM
LANDAU
MODEL
Аннотация:
Homogeneous thermal fluctuations of the orientational order parameters S and G of biaxial
molecules
in a uniaxial nematic liquid crystal are investigated in the framework of the molecular-statistical theory. It is demonstrated that the molecular biaxiality significantly affects the order parameters S and G, their temperature dependences in the nematic phase, the amplitude and the temperature dependence of the order parameter fluctuations in the nematic and isotropic phases, and the character of the transition from the nematic phase to the isotropic liquid phase. It is established that the fluctuations of the parameters S and G in the nematic phase are related to the temperature dependences of S and G and the susceptibilities chi(S) and chi(G) of the nematic liquid crystal to external fields, which leads to a change in the parameters S and G at a fixed director orientation. Explanations are offered for the known experimental data on the orientational ordering of biaxial
molecules
under the action of external fields in the isotropic phase of nematic liquid crystals. (C) 2003 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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20.
Shabanov, V. F.
Migration of
molecules
in p-bromochlorobenzene with vacancies in its structure / V. F. Shabanov, M. A. Korshunov> // Phys. Solid State. - 1998. -
Vol. 40
,
Is. 10
. - P. 1664-1666,
DOI
10.1134/1.1130630. - Cited References: 8 . - ISSN 1063-7834
Аннотация:
Based on polarization measurements of the low-frequency Raman spectra of p-bromochlorobenzene and calculations of the frequency spectra of lattice vibrations by the Dean method it is shown that the structure may contain vacancies. Their presence affects the appearance of additional lines in the low-frequency spectrum, particularly in the vicinity of 70 cm(-1), and their positions depend weakly on the orientational disorder of the
molecules
with respect to the para substituents. The activation energies for diffusion in a randomly disordered p-bromochlorobenzene crystal with vacancies in the structure is calculated from atom-atom potentials. It is shown that the value of the activation energy varies along a selected direction and depends on the arrangement of the p-bromochlorobenzene
molecules
with respect to the para substituents, in contrast to the results for ordered p-dibromobenzene and p-dichlorobenzene. (C) 1998 American Institute of Physics. [S1063-7834(98)01410-5].
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Публикация на русском языке
Шабанов, Василий Филиппович. Миграция молекул в парабромхлорбензоле при наличии в структуре вакансий [Текст] / В. Ф. Шабанов, М. А. Коршунов // Физ. тверд. тела. - 1998. - Т. 40 Вып. 10. - С. 1835-1838
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Korshunov, M. A.; Коршунов, Михаил Анатольевич; Шабанов, Василий Филиппович
}
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