Mutual orientation of the n→π* and π → π* transition dipole moments in azo compounds: Determination by light-induced optical anisotropy

S. Yu Grebenkin, V. M. Syutkin, Denis S. Baranov

Результат исследования: Научные публикации в периодических изданияхстатья

3 Цитирования (Scopus)

Аннотация

Photonic applications of azo compounds often require to know the polarization of molecular absorption bands. In this study, we demonstrate how the kinetics of light-induced anisotropy can be used to determine the mutual orientation of transition dipole moments pertaining to different absorption bands of an azo compound. The time profiles of light-induced anisotropy of the polymeric films doped with azo compounds p-azotoluene (AT) and 1-naphthyl-p-azo-methoxybenzene (NAMB) are analysed using commonly accepted models of photo-orientation. It is found that under irradiation of the films containing NAMB in the n → π* band of NAMB, the anisotropy level is too low compared to the anisotropy formed under irradiation in the π → π* band. The data are interpreted as demonstrating that the dipole moments of the n → π* and π → π* transitions of the NAMB molecule are not collinear. The angle between them was estimated to be 32.5 ± 5°.

Язык оригиналаанглийский
Страницы (с-по)1-7
Число страниц7
ЖурналJournal of Photochemistry and Photobiology A: Chemistry
Том344
DOI
СостояниеОпубликовано - 1 июл 2017

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