Ultrafast photodimerization dynamics in α-cyano-4-hydroxycinnamic and sinapinic acid crystals

被引：31

作者：

Hoyer, Theo ^{[1
]}

Tuszynski, Wilfried ^{[1
]}

Lienau, Christoph ^{[1
]}

机构：

[1] Carl Ossietzky Univ, Inst Phys, D-26111 Oldenburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 443卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2007.06.038

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：

We report a sub-picosecond time-resolved fluorescence spectroscopic study of different cinnamic acid crystals, model systems for solid-state photodimerization reactions. For alpha-cyano-4-hydroxycinnamic acid (alpha-CHC), we identify the emission spectra of both monomers and dimers, allowing us to directly probe the photoinduced dynamics of both species. The dimerization occurs on a timescale of 10 ps and results in a long-lived dimer product, stable for hours. For sinapinic acid, we find an extremely fast, sub-picosecond dimerization reaction and a short-lived dimer. This first sub-picosecond time-resolved dimerization study in cinnamic acid crystals provides a new basis for relating their structural properties and microscopic reaction dynamics. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：107 / 112

页数：6

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