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Photoinduced Electron Transfer Reactions of Highly Conjugated Thiophenes for Initiation of Cationic Polymerization and Conjugated Polymer Formation

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dc.contributor.authorAydogan, BİNNUR
dc.contributor.authorYağcı, Yusuf
dc.contributor.authorToppare, Levent
dc.contributor.authorJockusch, Steffen
dc.contributor.authorTurro, Nicholas J.
dc.contributor.institutionauthorTEMEL, BİNNUR
dc.date.accessioned2020-10-29T23:48:15Z
dc.date.available2020-10-29T23:48:15Z
dc.date.issued2012-10-09T00:00:00Z
dc.description.abstractPhotoinduced electron transfer reactions of highly conjugated thiophene derivatives, 4,7-di(2,3-dihydrothieno[3,4-b] [1,4]dioxin-5-yl)benzo[1,2,5]thiadiazole (DTDT) and 5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2,3-di(thiophen-2-yl)quinoxaline (DTDQ), with diphenyl-iodonium hexafluorophosphate (Ph2I+PF6-) and triphenylsulfonium hexafluorophosphate (Ph3S+PF6-) were investigated by laser flash photolysis, fluorescence and phosphorescence spectroscopy, and polymerization studies. High fluorescence quantum yields, long fluorescence lifetimes (similar to 10 ns in aprotic solvents), and absence of detectable phosphorescence at 77 K for both compounds indicate inefficient intersystem crossing into the triplet state and dominant role of singlet excited state. Photolysis of DTDT or DTDQ in the presence of iodonium salt with visible light results in the formation of radical cations of DTDT and DTDQ as detected by laser flash photolysis. Sulfonium salts do not undergo such electron transfer reactions due to the unfavorable redox potentials. The importance of the described photoinduced electron transfer process with respect to the initiation of cationic polymerization and formation of conjugated polymers was demonstrated.
dc.identifier.citationAydogan B., Yağcı Y., Toppare L., Jockusch S., Turro N. J. , -Photoinduced Electron Transfer Reactions of Highly Conjugated Thiophenes for Initiation of Cationic Polymerization and Conjugated Polymer Formation-, MACROMOLECULES, cilt.45, ss.7829-7834, 2012
dc.identifier.doi10.1021/ma301546d
dc.identifier.scopus84867340282
dc.identifier.urihttp://hdl.handle.net/20.500.12645/27002
dc.identifier.wosWOS:000309505500020
dc.titlePhotoinduced Electron Transfer Reactions of Highly Conjugated Thiophenes for Initiation of Cationic Polymerization and Conjugated Polymer Formation
dc.typeArticle
dspace.entity.typePublication
local.avesis.iddb8f80fb-a309-45cf-bca8-1cf1f57c3eb7
local.publication.isinternational1
relation.isAuthorOfPublicationd73c61cc-93fa-4fce-a294-f68e807cd50a
relation.isAuthorOfPublication.latestForDiscoveryd73c61cc-93fa-4fce-a294-f68e807cd50a
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