Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5138
DC FieldValueLanguage
dc.contributor.authorSeixas de Melo, J.-
dc.contributor.authorPina, J.-
dc.contributor.authorBurrows, H. D.-
dc.contributor.authorBrocke, S.-
dc.contributor.authorHerzog, O.-
dc.contributor.authorThorn-Csányi, E.-
dc.date.accessioned2008-09-01T15:04:36Z-
dc.date.available2008-09-01T15:04:36Z-
dc.date.issued2004en_US
dc.identifier.citationChemical Physics Letters. 388:4-6 (2004) 236-241en_US
dc.identifier.urihttp://hdl.handle.net/10316/5138-
dc.description.abstractSpectroscopic and photophysical properties of two p-phenylenevinylene (PV) trimers, 2,5-substituted diheptyl-(p-phenylenevinylene) and di-[(2-ethylhexyl)oxy]-(p-phenylenevinylene), were studied using absorption spectroscopy, fluorescence and laser flash photolysis. The change from alkyl to alkyloxy groups red-shifts the absorption and fluorescence bands. The rate of internal conversion is independent of the substitution, whereas alkyloxy substitution increases the S1 [rightwards wave arrow] T1 intersystem crossing rate by an order of magnitude. The relevance for the behaviour of conjugated PPV polymers is discussed. For diheptyl-PV, a sample having ca. 3% of the cis-configuration was also studied. Comparison between the all-trans and the cis-contaminated samples revealed no significant differences in their photophysical properties.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TFN-4C0TKVG-4/1/bb1be7e4a272bb7910483cae927d04acen_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleThe effect of substitution and isomeric imperfection on the photophysical behaviour of p-phenylenevinylene trimersen_US
dc.typearticleen_US
item.languageiso639-1en-
item.grantfulltextopen-
item.fulltextCom Texto completo-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
file69066893ad2a4fa6bd329e07c35c5dc8.pdf291.9 kBAdobe PDFView/Open
Show simple item record

Page view(s)

174
checked on Oct 15, 2019

Download(s)

53
checked on Oct 15, 2019

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.