Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5029
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dc.contributor.authorMelo, J. Seixas de-
dc.contributor.authorPina, J.-
dc.contributor.authorRodrigues, L. M.-
dc.contributor.authorBecker, R. S.-
dc.date.accessioned2008-09-01T15:02:43Z-
dc.date.available2008-09-01T15:02:43Z-
dc.date.issued2008en_US
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry. 194:1 (2008) 67-75en_US
dc.identifier.urihttp://hdl.handle.net/10316/5029-
dc.description.abstractA series of conjugated oligomers with rigid (fused-ring) structure, consisting in different polycyclic aromatic hydrocarbons (PAHs) possessing a single thiophene unit, here designated as arylthiophenes, were investigated in solution. For presentation clarity, the compounds were organized in two different groups. The first group includes the compounds where one, two, three and four benzene rings are added to a thiophene unit (a compound with two dibenzothiophene units was also investigated) and the second group includes those compounds where a single thiophene ring is located at different positions in a skeletal-type polyaromatic hydrocarbon (in the present case phenanthrene). The study includes a complete spectroscopic evaluation (including singlet-singlet and triplet-triplet absorption, fluorescence and phosphorescence spectra) as well as a photophysical evaluation (fluorescence, phosphorescence and triplet lifetimes together with fluorescence and triplet occupation quantum yields. With all the above, a complete set of deactivation rate constants (kF, kIC and kISC) was determined. From the fluorescence and phosphorescence spectra the energy of the lowest lying singlet and triplet states (S1 and T1) and the energy of splitting between the two states ([Delta]ES1-T1) was obtained. Semi-empirical ZINDO/S-CI calculations were performed and corroborated the nature and state order experimentally obtained.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TGY-4P7X4PJ-4/1/54746d05274422db835f8ebcc3f2a771en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPhotochemistryen_US
dc.subjectPhotophysicsen_US
dc.subjectArylthiopheneen_US
dc.subjectFluorescenceen_US
dc.subjectPhosphorescenceen_US
dc.subjectQuantum yieldsen_US
dc.subjectOligomeren_US
dc.subjectLaser flash photolysisen_US
dc.subjectThiopheneen_US
dc.subjectPhenanthreneen_US
dc.titleA comprehensive study of the spectral and photophysical properties of arylthiophenesen_US
dc.typearticleen_US
dc.identifier.doi10.1016/j.jphotochem.2007.07.014-
uc.controloAutoridadeSim-
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0001-9708-5079-
crisitem.author.orcid0000-0003-1848-1167-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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