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Mechanism of Photoinitiated Free Radical Polymerization by Thioxanthone−Anthracene in the Presence of Air

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dc.contributor.authorBalta, Demet Karaca
dc.contributor.authorArsu, Nergis
dc.contributor.authorYagci, Yusuf
dc.contributor.authorSundaresan, Arun K.
dc.contributor.authorJockusch, Steffen
dc.contributor.authorTurro, Nicholas J.
dc.date.accessioned2026-01-25T04:30:41Z
dc.date.issued2011-03-25
dc.description.abstractThe mechanism of formation of initiating radicals for free radical polymerization by the thioxanthone−anthracene (TX-A) photoinitiator was investigated by laser flash photolysis, fluorescence and phosphorescence spectroscopy, and polymerization studies. The proposed mechanism of photoinitiation involves photoexcitation of TX-A and quenching of triplet excited states of TX-A by molecular oxygen to generate singlet oxygen. Singlet oxygen reacts with the anthracene moiety of TX-A to form an endoperoxide. The endoperoxide intermediate was isolated and characterized by MS and 1H NMR. The endoperoxide undergoes photochemical or thermal decomposition to generate radicals which are able to initiate free radical polymerization. A significant deuterium effect on the polymerization rates using CDCl3 and CHCl3 as solvents confirmed the involvement of singlet oxygen in the initiation process.
dc.description.urihttps://doi.org/10.1021/ma200147f
dc.description.urihttps://dx.doi.org/10.1021/ma200147f
dc.description.urihttps://avesis.yildiz.edu.tr/publication/details/30054c31-90d0-42bf-8ef2-283c87ca85d3/oai
dc.description.urihttps://aperta.ulakbim.gov.tr/record/19723
dc.identifier.doi10.1021/ma200147f
dc.identifier.eissn1520-5835
dc.identifier.endpage2535
dc.identifier.issn0024-9297
dc.identifier.openairedoi_dedup___::622659e365eb19aa747b4de95be2a008
dc.identifier.orcid0000-0002-9240-2714
dc.identifier.orcid0000-0002-1362-2517
dc.identifier.orcid0000-0002-4592-5280
dc.identifier.startpage2531
dc.identifier.urihttps://hdl.handle.net/11527/45524
dc.identifier.volume44
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS)
dc.relation.ispartofMacromolecules
dc.rightsOPEN
dc.titleMechanism of Photoinitiated Free Radical Polymerization by Thioxanthone−Anthracene in the Presence of Air
dc.typeArticle
dspace.entity.typePublication

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