1,3,5-Tristyrylbenzene dendrimers: a novel model system to explore oxygen quenching in a highly organized environment
作者:Mayuko Uda、Atsuya Momotake、Tatsuo Arai
DOI:10.1039/b303412g
日期:——
Control of the efficiency of photoisomerization by oxygen was demonstrated for 1,3,5-tristyrylbenzene dendrimers 1–3; the large dendrons do not significantly affect the photochemistry itself due to volume-conserving isomerization mechanisms but may affect the mobility of the molecules.
The photochemical isomerization of cross-linked 1,3,5-tristyrylbenzene dendrimer with hula-twist mechanism
作者:Mayuko Uda、Atsuya Momotake、Tatsuo Arai
DOI:10.1016/j.tetlet.2005.03.015
日期:2005.4
5-tristyrylbenzene dendrimer 5 was synthesized to study the photochemical isomerization mechanism. On irradiation, 5 isomerized with the quantum yields (ΦE→Z) of 0.063, which was not very much different from that for a modelcompound 1 (ΦE→Z 0.080), supporting a volume-conserving hula-twist (HT) mechanism during the photochemical E–Z isomerization.