Optical properties of π-conjugated donor-acceptor systems with controlled hyperpolarizability
For supramolecular compounds with donor and acceptor fragments, coupled with each other by the π-conjugated methyn chain, it was ascertained an influence of Cl and Br atoms on the π-conjugation and charge transfer in them in molecular and aggregate states. Compound, which contains Br atom, crysta...
Збережено в:
| Дата: | 2008 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2008
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| Назва видання: | Semiconductor Physics Quantum Electronics & Optoelectronics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119048 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Optical properties of π-conjugated donor-acceptor systems with controlled hyperpolarizability / Yu.P. Piryatinski, М.М. Sevryukova // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2008. — Т. 11, № 3. — С. 292-302. — Бібліогр.: 21 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | For supramolecular compounds with donor and acceptor fragments, coupled
with each other by the π-conjugated methyn chain, it was ascertained an influence of
Cl and Br atoms on the π-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 twophoton
excited. Possible mechanisms of intramolecular charge transfer and collective
interactions in investigated molecular structures under one- and two-photon excitation
are considered. |
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