THE ROLE OF THE CIS-KETO TRIPLET-STATE IN THE PROTON-TRANSFER CYCLE OF 2-(2'-HYDROXYPHENYL) BENZOTHIAZOLE

被引：32

作者：

CHOU, PT

MARTINEZ, ML

STUDER, SL

机构：

[1] Department of Chemistry, University of South Carolina, Columbia

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 195卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(92)85567-T

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A two-step laser-induced fluorescence (TSLIF) study of 2-(2-hydroxyphenyl)benzothiazole (HBT) in various solvents at < 100 K revealed an unusually high yield of tautomer emission resulting from the T2' --> S1' intersystem crossing (ISC, prime denotes the tautomer state) of the cis-keto form. The T-S ISC yield was measured to be 5.2 x 10(-4) in a 77 K MCH glass. A mechanism incorporating T(n-pi*) ---> S(pi-pi*). ISC is discussed. The identical spectra between non-time-resolved,prompt tautomer emission and TSLIF gives further support for the assignment to the cis-keto triplet state.

引用

页码：586 / 590

页数：5

共 18 条

[1] TRIPLET-STATE FORMATION AND CIS-]TRANS ISOMERIZATION IN THE EXCITED SINGLET-STATE OF THE KETO TAUTOMER OF 2-(2'-HYDROXYPHENYL)BENZOTHIAZOLE [J].