Thioxanthonation of 2-naphthalene-thioacetic acid as a visible-light photoinitiator: The investigation of photophysical and photochemical properties

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dc.authorid0000-0003-0524-4189
dc.authorid0000-0002-1362-2517
dc.contributor.authorDogruyol, Sevnur Keskin
dc.contributor.authorDogruyol, Zekeriya
dc.contributor.authorKazancioglu, Elif Ozcelik
dc.contributor.authorGokcek, Hasniye
dc.contributor.authorArsu, Nergis
dc.date.accessioned2026-02-12T21:05:30Z
dc.date.available2026-02-12T21:05:30Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThioxanthonation of naphthalene thioacetic acid (TXNPSCH2COOH) resulted a visible light photoinitiator with the high molar absorptivity (epsilon 405: 5680 L.mol- 1.cm- 1) in the visible spectral region and made this compound an attractive photoinitiator for free radical polymerization reactions. Low fluorescence quantum yield (phi F: 0.06 in 2-MeTHF) and comparatively low triplet energy (186 kJ/mol in 2-MeTHF) was in favorable for efficient intersystem crossing to the triplet state which is necessary for production of initiating radicals. Indeed, photopolymerization of methyl methacrylate along with TXNPSCH2COOH (1 x 10-3 M) and a tertiary amine namely MDEA yielded nearly 25% conversion of monomer to polymer. All spectrophotometric studies including laser flash photolysis which gives triplet lifetime of initiator which is very important information for initiation mechanism of photoinitiators, indeed a long enough triplet lifetime of TXNPSCH2COOH (tau T: 1000 ns) allows for efficient reactions with co-initiators to generate radicals.
dc.identifier.doi10.1016/j.eurpolymj.2023.112440
dc.identifier.issn0014-3057
dc.identifier.issn1873-1945
dc.identifier.scopus2-s2.0-85171739867
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.eurpolymj.2023.112440
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6985
dc.identifier.volume198
dc.identifier.wosWOS:001089111200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofEuropean Polymer Journal
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectPhotoinitiator
dc.subjectAnnelated thioxanthone
dc.subjectPhotopolymerization
dc.subjectType II system
dc.subjectFluorescence quantum yield
dc.subjectLaser flash photolysis
dc.titleThioxanthonation of 2-naphthalene-thioacetic acid as a visible-light photoinitiator: The investigation of photophysical and photochemical properties
dc.typeArticle

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