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Photoreaction and photopolymerization studies on fluoflavin dye–pyridinium salt systems

Paper ID Volume ID Publish Year Pages File Format Full-Text
28657 44084 2008 9 PDF Available
Title
Photoreaction and photopolymerization studies on fluoflavin dye–pyridinium salt systems
Abstract

Several dyes derived from 5,12-dihydroquinoxalino[2,3b]quinoxaline have been synthesised and evaluated as sensitizers for alkoxypyridinium salt photodecomposition. The results are discussed on the basis of the free energy change for electron transfer from fluoflavin dyes to alkoxypyridinium compounds. The mechanism of dye photobleaching is supported by DFT calculations, spectroscopic characterization of the cation radical of the dye, and the quantum yields of sensitised proton formation. Fluoflavin dyes are shown to be useful as photoinitiators for sensitizing compounds to photooxidation. Photoredox pairs consisting of fluoflavin dyes and alkoxypyridinium salt are found to be effective initiation systems for free radical polymerization of methyl acrylate and trimethylolpropane triacrylate (TMPTA) using VIS light.

Keywords
Fluoflavin dyes; Photoinitiator; Alkoxypyridinium photodecomposition; Photopolymerization; Photoinduced electron transfer
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Photoreaction and photopolymerization studies on fluoflavin dye–pyridinium salt systems
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 198, Issue 1, 5 July 2008, Pages 60–68
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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