PHOTOCHEMICAL CIS TO TRANS ONE-WAY ISOMERIZATION OF STYRYLAZULENES ON THEIR TRIPLET EXCITED-STATE - EXAMINATION OF ETHYLENES WITH NON-BENZENOID SUBSTITUENTS OF LOW TRIPLET ENERGIES

被引：6

作者：

KARATSU, T ^{[1
]}

KITAMURA, A ^{[1
]}

ARAI, T ^{[1
]}

SAKURAGI, H ^{[1
]}

TOKUMARU, K ^{[1
]}

机构：

[1] UNIV TSUKUBA, DEPT CHEM, TSUKUBA, IBARAKI 305, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1994年 / 67卷 / 06期

关键词：

D O I：

10.1246/bcsj.67.1674

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

1-Styrylazulene and 7-isopropyl-1,4-dimethyl-3-styrylazulene (3-styrylguaiazulene) underwent one-way isomerization from the cis to the trans isomer on triplet sensitization. Their triplet states as intermediates of the isomerization were observed by laser flash photolysis. However, their excitation to either the lowest excited singlet state (S1) or the second excited singlet state (S2) by direct irradiation afforded photostationary mixtures comprising 98% of the trans and 2% the cis isomers, which implies the participation of a singlet isomerization path.

引用

页码：1674 / 1679

页数：6