Deuterium isotope effect on the charge recombination dynamics of contact ion pairs formed by electron-transfer quenching in acetonitrile

被引：45

作者：

Muller, PA

Högemann, C

Allonas, X

Jacques, P

Vauthey, E ^{[1
]}

机构：

[1] Univ Fribourg, Inst Chim Phys, CH-1700 Fribourg, Switzerland

[2] Univ Haute Alsace, UMR CNRS 7525, Dept Photochim Gen, F-68093 Mulhouse, France

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 326卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(00)00791-0

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：

The deuterium isotope effect on the fluorescence lifetime of contact ions pairs (CIP) composed of 9,10-dicyanoanthracene and weak aromatic electron donors in acetonitrile has been investigated. For all pairs studied, an increase of the emission lifetime with increasing deuterium substitution on both the electron acceptor and the electron donor was observed. The free ion yield shows the same variation upon deuteration. It is concluded that the efficiency of free ions formation is essentially determined by the competition, within the CIP, between charge recombination and dissociation into free ions and that loose ion pairs do not play a significant role. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：321 / 327

页数：7

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