Laser photolysis studies of endoergonic triplet energy transfer in solution by observing the carbon-sulfur bond cleavage of triplet-sensitized naphthylmethyl phenyl sulfide

被引：18

作者：

Yamaji, M ^{[1
]}

Wakabayashi, S ^{[1
]}

Ueda, S ^{[1
]}

Shizuka, H ^{[1
]}

Tobita, S ^{[1
]}

机构：

[1] Gunma Univ, Dept Chem, Kiryu, Gumma 3768515, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 368卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(02)01816-X

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 bimolecular rate constant (k(q)) and an efficiency (OCTET) of an endoergonic triplet energy transfer from triplet alpha-naphthyl phenyl ketone (NPK) to alpha-naphthylmethyl phenyl sulfide (NMPS) in solution, where the energy difference (DeltaE(T)) is 1.7 kcal mol(-1), have been determined by means of nanosecond laser flash photolysis. Base on the Arrhenius plots of the k(q) value for the NPK-NMPS system, an activation energy (DeltaE(a)) for the endoergonic triplet energy transfer is found to be 2.6 kcal mol(-1), which is larger than the endothermic energy gap (DeltaE(T) = 1.7 kcal mol(-1)). The endoergonic triplet energy transfer in solution is demonstrated to proceed with the aid of thermal activation for the first time. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：41 / 48

页数：8