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The hydrotrope effect on the photopolymerization of styrenesulfonate initiated by Ru complexes

Paper ID Volume ID Publish Year Pages File Format Full-Text
28414 44074 2007 5 PDF Available
Title
The hydrotrope effect on the photopolymerization of styrenesulfonate initiated by Ru complexes
Abstract

Styrenesulfonate (StyS) was photopolymerized in the presence of tris(2,2′-bipyridine)ruthenium(II) chloride and triethylamine (TEA) or triethanolamine (TEAOH). Polymerization observed in both cases is obtained, but the rate is faster with triethylamine. The results are correlated with the ability of the monomer to form hydrotropic domains at sufficiently high concentrations (>0.1 M). The emission intensity behaviour and the lifetimes of the [Ru(bpy)3]2+ MLCT state confirm that the positively charged Ru complex is placed in those domains. At the same time, the amount of the reduced complex transient, [Ru(bpy)3]+, in solutions containing toluenesulfonate points to the presence of TEA in the same domains. On the other hand, the lower rate observed for the photopolymerization in the presence of TEAOH is attributed to the preferential placing of this amine in the bulk of the aqueous solution, outside the hydrotropic environment.

Keywords
Photopolymerization; Hydrotropes; Styrenesulfonate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2–3, 20 May 2007, Pages 329–333
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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