Primary photoisomerization reactions of 6-phenoxy-5,12-naphthacenequinoneстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 ноября 2014 г.
Аннотация:Primary processes of 6-phenoxy-5,12-naphthacenequinone (PhNQ) photoisomerization initiated by femtosecond light pulses of wavelength 307 nm are studied experimentally and theoretically. The kinetics of photoinduced absorption spectra in the range from 420 to 540 nm is explored at times up to 100 ps. Energies of the excited states of the A and B modifications of PhNQ, as well as the dependences of the potential energies of excited-state PhNQ on the reaction coordinate, were calculated by the semi-empirical CINDO/S-CI method, while the molecular geometry was optimized by the AM1 method. It is found that despite a considerable store of the electron energy, the photochemical isomerization of molecules promoted to the S-3 state proceeds exclusively via triplet states. A mechanism of primary photoisomerization reactions of 6-phenoxy-5,12-naphthacenequinone is proposed.