Detecting electronic coherence in excited-state electron transfer in fluorinated benzenes - art. no. 068301

被引：29

作者：

Kovalenko, SA ^{[1
]}

Dobryakov, AL ^{[1
]}

Farztdinov, V ^{[1
]}

机构：

[1] Humboldt Univ, Dept Chem, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.96.068301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoinduced electron transfer (ET) in heavily fluorinated benzenes in solution has been studied with broadband transient absorption spectroscopy. Spectrally resolved kinetics exhibit oscillations with amplitude up to 70% of the signal. The oscillation frequency is specific for each probe; in addition, for pentafluorobenzene it markedly depends on solvent, being 86 cm(-1) in hexane and 94 cm(-1) in acetonitrile. We argue that the observed behavior is not related to vibrational coherences, but originate from coherent electronic motion between an optically excited and an ET state.

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