First investigations of the kinetics of the topochemical reaction of p-formyl-trans-cinnamic acid by time-resolved X-ray diffraction

被引：37

作者：

Busse, G

Tschentscher, T

Plech, A

Wulff, M

Frederichs, B

Techert, S ^{[1
]}

机构：

[1] Max Planck Inst Biophys Chem, Dept 010, D-37070 Gottingen, Germany

[2] DESY, HASYLAB, D-22607 Hamburg, Germany

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

FARADAY DISCUSSIONS | 2003年 / 122卷

关键词：

D O I：

10.1039/b202831j

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：

Under UV irradiation p-formyl-trans-cinnamic acid (p-FCA) crystals in the beta-phase dimerise irreversibly to solid 4,4'-diformyl-beta-truxinic acid. The experimental conditions were chosen in such a way (non-aqueous environment and room temperature) that the product formed is amorphous. The kinetics of this bimolecular reaction, which has not yet been characterised, was investigated by picosecond time-resolved X-ray diffraction. From the experimental results a mechanism for this topochemical reaction is proposed including two observed time constants, one less than 100 ps and another of several seconds. The feasibility of investigating this class of substances by time-resolved X-ray diffraction from third generation synchrotron sources and future free-electron lasers is discussed.

引用

页码：105 / 117

页数：13

共 38 条

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