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A Thioxanthone-Based Visible Photoinitiator

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dc.contributor.authorDogruyol, Sevnur Keskin
dc.contributor.authorDogruyol, Zekeriya
dc.contributor.authorArsu, Nergis
dc.contributor.institutionauthorARSU, Nergis
dc.date.accessioned2026-06-27T13:14:15Z
dc.date.issued2011
dc.description.abstractThioxanthone-based 9-(2-Morpholine-4yl-acetyl)-5-thia-napthasen-12-one (TX-MPM) was synthesized and characterized as a one-component novel visible photoinitiator. Its capability to act as an initiator for the polymerization of methyl methacrylate (MMA) was examined in photoreactor and also daylight. Photophysical properties: fluorescence and phosphorescence emission spectra and fluorescence quantum yield of TX-MPM (Phi(f) = 0.29) were determined. The phosphorescence lifetime was found 131 ms for TX-MPM and 110 ms for initiator-attached polymer (PMMA) at 77 K, indicated a pi ->pi* nature of the lowest triplet state. A model compound, morpholino acetonapthone was used as quencher for the triplet states of TX-MPM and the quenching rate constant was determined (k(q) = 1.26 x 10(9) M(-1)s(-1)). According to laser flash photolysis studies, intermolecular hydrogen abstraction process was more dominant path to the formation of the initiating radicals. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 4037-4043, 2011en
dc.description.sponsorshipYildiz Technical University
dc.description.sponsorshipTUBITAK
dc.description.sponsorshipTurkish State Planning Organization (DPT)
dc.description.urihttps://doi.org/10.1002/pola.24846
dc.identifier.doi10.1002/pola.24846
dc.identifier.eissn1099-0518
dc.identifier.endpage4043
dc.identifier.issn0887-624X
dc.identifier.issue18
dc.identifier.startpage4037
dc.identifier.urihttps://hdl.handle.net/20.500.14981/50882
dc.identifier.volume49
dc.identifier.wos000294818600017
dc.language.isoeng
dc.publisherWILEY
dc.relation.ispartofJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
dc.subjectinitiators
dc.subjectphotochemistry
dc.subjectphotopolymerization
dc.subjectFREE-RADICAL POLYMERIZATION
dc.subjectCHAIN THIOXANTHONE
dc.subjectCOINITIATOR
dc.subjectMACROPHOTOINITIATOR
dc.subjectMETHACRYLATE
dc.subjectGELATION
dc.subjectAMINE
dc.subjectACID
dc.subjectPolymer Science
dc.titleA Thioxanthone-Based Visible Photoinitiator
dc.typeArticle
dspace.entity.typePublication
local.import.sourceWOS

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