Mechanism and dynamics of azobenzene photoisomerization

被引：294

作者：

Schultz, T

Quenneville, J

Levine, B

Toniolo, A

Martínez, TJ

Lochbrunner, S

Schmitt, M

Shaffer, JP

Zgierski, MZ

Stolow, A

机构：

[1] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1N 0R6, Canada

[2] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 27期

关键词：

D O I：

10.1021/ja021363x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The excited-state dynamics of trans-azobenzene were investigated by femtosecond time-resolved photoelectron spectroscopy and ab initio molecular dynamics. Two near-degenerate ππ* excited states, S2 and S3,4, were identified in a region hitherto associated with only one excited state. These results help to explain contradictory reports about the photoisomerization mechanism and the wavelength dependence of the quantum yield. A new model for the isomerization mechanism is proposed. Copyright © 2003 American Chemical Society.

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页码：8098 / 8099

页数：2

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