Photoinitiators and photoinitiation - Part 13. The photodecomposition of sulphonic esters of alpha-hydroxymethylbenzoin ethers

Gaur, H.A and Hageman, H.J. and Oosterhoff, P. and Overeem, T. and Verbeek, J. and van der Werf, S. (1998) Photoinitiators and photoinitiation - Part 13. The photodecomposition of sulphonic esters of alpha-hydroxymethylbenzoin ethers. Journal of Photochemistry and Photobiology a-Chemistry, 112 (1). pp. 87-93. ISSN 1010-6030. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/S1010-6030(97)00255-4

Abstract

The photodecomposition of some sulphonic esters of alpha-hydroxymethylbenzoin ethers is examined using ESR and radical trapping techniques. Photoinduced alpha-cleavage into benzoyl and alpha-alkoxy-alpha-sulphonyloxymethylbenzyl radicals from a short-lived triplet excited state is observed. The alpha,alpha-disubstituted benzyl radicals undergo subsequent fragmentation, generating benzoylmethylradicals and sulphonic acids at a rate k(el) < 10(7) s(-1). The fate of the alkyl ether part of the alpha,alpha-disubstituted benzyl radicals after elimination of sulphonic acid is unknown at present.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: R.F. Xu
Date Deposited: 26 Oct 2009 19:46
Last Modified: 26 Oct 2009 19:46
Resource URI: http://kar.kent.ac.uk/id/eprint/17759 (The current URI for this page, for reference purposes)
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