Volume 122, 2003
From the journal:

Faraday Discussions

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

G. Busse,a   T. Tschentscher,b   A. Plech,c   M. Wulff,c   B. Frederichsa  and  S. Techert*a  

* Corresponding authors

a Max-Planck-Institute for Biophysical Chemistry, Dept. 010, Göttingen, Germany
E-mail: stecher@gwdg.de

b Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronensynchrotron DESY, Notkestraße 85, Hamburg, Germany

c European Synchrotron Radiation Facility, B. P. 220, Grenoble Cedex, France

Abstract

Under UV irradiation p-formyl-trans-cinnamic acid (p-FCA) crystals in the β-phase dimerise irreversibly to solid 4,4′-diformyl-β-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.

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Article information

DOI
https://doi.org/10.1039/B202831J
Article type
Paper
Submitted
20 Mar 2002
Accepted
12 Apr 2002
First published
01 Aug 2002

Faraday Discuss., 2003,122, 105-117

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

G. Busse, T. Tschentscher, A. Plech, M. Wulff, B. Frederichs and S. Techert, Faraday Discuss., 2003, 122, 105 DOI: 10.1039/B202831J

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