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.
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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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