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Issue 1, 2004
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An in situ time-dependent study of the photodimerisation of chloro-derivatives of trans-cinnamic acid using infrared microspectroscopy with a synchrotron radiation source

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Abstract

The photodimerisation of single crystals of substituted cinnamic acid has been monitored continuously by infrared microscopy using a synchrotron source. The β-form of 2,4-dichloro-trans-cinnamic acid dimerises under ultraviolet irradiation to form the corresponding β-truxinic acid derivative in a reaction which follows strictly first order kinetics. By contrast the corresponding reactions in single crystals of β-2-chloro-trans-cinnamic acid and β-4-chloro-trans-cinnamic acid deviate somewhat from first order kinetics as a result of solid-state effects. In all three cases the reactions proceed smoothly from monomer to dimer with no hint of any reaction intermediate.

Graphical abstract: An in situ time-dependent study of the photodimerisation of chloro-derivatives of trans-cinnamic acid using infrared microspectroscopy with a synchrotron radiation source

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Publication details

The article was received on 21 Oct 2003, accepted on 12 Nov 2003 and first published on 20 Nov 2003


Article type: Communication
DOI: 10.1039/B313306K
Phys. Chem. Chem. Phys., 2004,6, 4-6

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    An in situ time-dependent study of the photodimerisation of chloro-derivatives of trans-cinnamic acid using infrared microspectroscopy with a synchrotron radiation source

    S. D. M. Atkinson, M. J. Almond, S. J. Hibble, P. Hollins, S. L. Jenkins, M. J. Tobin and K. S. Wiltshire, Phys. Chem. Chem. Phys., 2004, 6, 4
    DOI: 10.1039/B313306K

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