Piryatinski Yu. P. Optical properties of <$E bold pi>-conjugated donor-acceptor systems with controlled hyperpolarizability / Yu. P. Piryatinski, M. M. Sevryukova // Semiconductor Physics, Quantum Electronics and Optoelectronics. - 2008. - 11, № 3. - С. 292-302. - Бібліогр.: 21 назв. - англ.For supramolecular compounds with donor and acceptor fragments, coupled with each other by the <$E pi>-conjugated methyn chain, it was ascertained an influence of Cl and Br atoms on the <$E pi>-conjugation and charge transfer in them in molecular and aggregate states. Compound, which contains Br atom, crystallizes into a noncentrosymmetric polar structure and under infrared (1064 nm) laser excitation it is observed the second harmonic generation and intense up-conversion photoluminescence in the visible spectral region. For compounds containing Cl atom, when passing into a crystalline state, only up-conversion photoluminescence is observed, which can be considered as two-photon excited. Possible mechanisms of intramolecular charge transfer and collective interactions in investigated molecular structures under one- and two-photon excitation are considered. Індекс рубрикатора НБУВ: В343.53
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Шифр НБУВ: Ж16425 Пошук видання у каталогах НБУВ
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