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Mutual orientation of the n→π* and π → π* transition dipole moments in azo compounds : Determination by light-induced optical anisotropy. / Grebenkin, S. Yu; Syutkin, V. M.; Baranov, Denis S.
в: Journal of Photochemistry and Photobiology A: Chemistry, Том 344, 01.07.2017, стр. 1-7.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Mutual orientation of the n→π* and π → π* transition dipole moments in azo compounds
T2 - Determination by light-induced optical anisotropy
AU - Grebenkin, S. Yu
AU - Syutkin, V. M.
AU - Baranov, Denis S.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - 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°.
AB - 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°.
KW - Azotoluene spectra
KW - Optical anisotropy
KW - Polymers
KW - Transition dipole moment
KW - MECHANISM
KW - CIS PHOTOISOMERIZATION
KW - HETEROGENEOUS DYNAMICS
KW - PHOTOORIENTATION
KW - AZO-DYE
KW - MOLECULES
KW - CONTAINING POLYMERS
KW - MATRICES
KW - AZOBENZENE
KW - LIQUID-CRYSTAL SYSTEMS
UR - http://www.scopus.com/inward/record.url?scp=85018729153&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2017.04.031
DO - 10.1016/j.jphotochem.2017.04.031
M3 - Article
AN - SCOPUS:85018729153
VL - 344
SP - 1
EP - 7
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
ER -
ID: 10256587