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The energy transfer from the upper triplet states of diphenylamine, naphthalene and triphenylene to toluene and hexene-1 is studed. Two mechanisms of dissipation transferred energy in solvents are discussed. 相似文献
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Alfimov M. V. Chibisov A. K. Zakharova G. V. Fedotova T. V. Plotnikov V. G. 《Russian Physics Journal》2020,63(8):1363-1369
Russian Physics Journal - The results of investigations of the properties of cyanine dye dimers in the triplet state are presented. The formation of dimers is demonstrated as two absorption bands... 相似文献
6.
The specifics of energy exchange by nonrelativistic electrons (electron energy of ∼102–103 eV) during their travelling through a dielectric layer have been studied depending on the thickness of the layer applied
on substrates with different parameters. Electron travelling across a dielectric (pyrene) layer with a thickness of up to
10 nm deposited on a metal (bismuth) mirror is accompanied by the following effects dependent on the dielectric-layer thickness
and the electric parameters of the boundary: a nonmonotonic change in the pyrene luminescence intensity and variation in secondary
electron emission. 相似文献
7.
N. Kh. Petrov D. A. Ivanov I. V. Kryukov A. D. Svirida Yu. A. Shandarov M. V. Alfimov 《Journal of fluorescence》2018,28(4):883-887
The time-resolved Stokes shift of fluorescence of styryl dye, trans-4-[4-(dimethylamino)-styryl]-1-methylpyridinium iodide (DASPI), and its host-guest complexes with cucurbit[6]uril (CB[6]) was studied by up-conversion technique on a 5 ps time scale. In all cases, the solvation time correlation function – that describes relaxation of the fluorescent state - contains two components. The time constant of the first component, which is related to the vibrational relaxation of the dye cation, increases from 118 fs without CB[6] to 224 fs in the presence CB[6]. It suggests the production of CB[6] complexes to disturb the hydrogen-bond net in the vicinity of DASPI cation. The time constant of the second component, which is associated with solvation, changes from 0.81 ps without CB[6] to 1.15 ps in the presence of the cavitand. The observed increase can be related to the displacement of the dye cation deeper into CB[6] that allows considering DASPI-CB[6] complexes as a light-controlled molecular machine with a response time on the picosecond scale. 相似文献
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The mechanisms of dissociation of oxygen-containing moieties (-OH, -HCO, -COOH) upon the photoreduction of graphite oxide
by UV light have been considered. It has been concluded that the photoreduction, which involves the detachment of the OH group
and the molecular elimination of CO and CO2, occurs in singlet excited states. The energy threshold of the photoreduction processes is determined by the position of
the repulsive terms of the system. 相似文献
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O. V. Rudenko P. V. Lebedev-Stepanov V. A. Gusev A. I. Korobov B. A. Korshak N. I. Odina M. Yu. Izosimova S. P. Molchanov M. V. Alfimov 《Acoustical Physics》2010,56(6):935-941
The formation of structured films consisting of ensembles of micro- or nanoparticles and possessing preset functional characteristics
is studied both experimentally and theoretically. The films are obtained by drying out droplets of colloidal solutions on
a solid substrate under the acoustic effect produced by a standing SAW field. 相似文献
10.
S. P. Gromov E. N. Ushakov A. I. Vedernikov L. G. Kuz’mina M. V. Alfimov 《Theoretical and Experimental Chemistry》2009,45(1):3-11
A universal approach to the molecular design of light-sensitive nanodimensional systems with specific characteristics was
developed on the basis of unsaturated and macrocyclic compounds. It was possible to construct various nanodimensional systems
within the scope of a single class of compound using a limited number of components. The use of photostructural transformations
to control complex formation and mechanical movements in molecular devices and machines is discussed.
Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 45, No. 1, pp. 1–7, January-February, 2009. 相似文献