Molecular Environment Effects That Modulate the Photophysical Properties of Novel 1,3-Phosphinoamines Based on 2,1,3-Benzothiadiazole Научная публикация
| Журнал |
Molecules
ISSN: 1420-3049 |
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| Вых. Данные | Год: 2022, Том: 27, Номер: 12, Номер статьи : 3857, Страниц : 13 DOI: 10.3390/molecules27123857 | ||||
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Реферат:
We report synthesis, crystal structure, and photophysical properties of novel 1,3-
phosphinoamines based on 4-amino-2,1,3-benzothiadiazole (NH2-btd): Ph2PCH(Ph)NH-btd (1) and
Ph2P(E)CH(Ph)NH-btd, (E = O (2 and 2 thf), S (3), Se (4)). Chalcogenides 2–4 exhibit bright
emissions with a major band at 519–536 nm and a minor band at 840 nm. According to TD-DFT
calculations, the first band is attributed to fluorescence, while the second band corresponds to phosphorescence.
In the solid state, room temperature quantum yield reaches 93% in the case of the
sulphide. The compounds under study feature effects of the molecular environment on the luminescent
properties, which manifest themselves in fluorosolvatochromism as well as in a luminescent
response to changes in crystal packing and in contributions to aggregation effects. Specifically, transformation
of solid 2 thf to solvate-free 2 either by aging or by grinding causes crystal packing
changes, and, as a result, a hypsochromic shift of the emission band. Polystyrene films doped with 2
reveal a bathochromic shift upon increasing the mass fraction from 0.2 to 3.3%, which is caused by
molecular aggregation effects.
Библиографическая ссылка:
Khisamov R.M.
, Ryadun A.A.
, Konchenko S.N.
, Sukhikh T.S.
Molecular Environment Effects That Modulate the Photophysical Properties of Novel 1,3-Phosphinoamines Based on 2,1,3-Benzothiadiazole
Molecules. 2022. V.27. N12. 3857 :1-13. DOI: 10.3390/molecules27123857 WOS Scopus РИНЦ OpenAlex
Molecular Environment Effects That Modulate the Photophysical Properties of Novel 1,3-Phosphinoamines Based on 2,1,3-Benzothiadiazole
Molecules. 2022. V.27. N12. 3857 :1-13. DOI: 10.3390/molecules27123857 WOS Scopus РИНЦ OpenAlex
Идентификаторы БД:
| Web of science: | WOS:000816129600001 |
| Scopus: | 2-s2.0-85132586787 |
| РИНЦ: | 49151270 |
| OpenAlex: | W4283074177 |