| Autor: |
Atabekyan, L. S., Avakyan, V. G., Alexandrova, N. A., Fomina, M. V., Gromov, S. P. |
| Předmět: |
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| Zdroj: |
Russian Chemical Bulletin; Apr2023, Vol. 72 Issue 4, p877-894, 18p |
| Abstrakt: |
The photophysical processes and photochemical reactions of a 15-crown-5-containing pyridine-based styryl dye and its complexes with potassium, barium, lead, and calcium perchlorates in MeCN were studied by absorption, luminescence, and laser kinetic spectroscopy. The processes of trans—cis-photoisomerization, intersystem crossing to the triplet state, and charge transfer giving the TICT state were found. Quantum chemical calculations for the structures of the dye and its complexes with metal cations were performed. It was concluded that the trans—cis-photoisomerization could proceed through the triplet state with the intermediate formation of a biradical. According to the calculations, the dye complexes with metal cations have 1:1 stoichiometry. In the case of barium cation, the possibility of formation of a 2:1 sandwich complex was also confirmed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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