Sterically hindered phenols are extremely efficient light quenchers

被引：14

作者：

Brede, O

Naumov, S

Hermann, R

机构：

[1] Univ Leipzig, Interdisciplinary Grp Time Resolved Spect, D-04303 Leipzig, Germany

[2] Inst Surface Modificat, D-04303 Leipzig, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 355卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(01)01451-8

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：

By means of the direct quantitative determination of the quantum yields of all deactivation channels of the first excited singlet state of selected alkyl substituted phenols it is shown, that sterically hindered (2,6-di-tert-butyl substituted) phenols (SHP) have extremely short singlet lifetimes and relax dominantly by radiationless processes. A quantum-chemical molecular analysis (vibration analysis, steric factors) gives evidence for an intense coupling interaction of the phenol group with the bulky substituents. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 7

页数：7

共 20 条

[1] SINGLE -] TRIPLET INTERSYSTEM CROSSING QUANTUM YIELDS OF PHOTOSYNTHETIC AND RELATED POLYENES [J].