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Calix[4]arene-carbazole-containing polymers: synthesis and properties

2012-09Journal article Restricted access
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dc.contributor.authorD. Barata, Patrícia
dc.contributor.authorCosta, Alexandra
dc.contributor.authorPrata, José Virgílio
dc.date.accessioned2015-09-08T13:45:40Z
dc.date.available2015-09-08T13:45:40Z
dc.date.issued2012-09
dc.description.abstractNew highly fluorescent calix[4]arene-containing phenylene-alt-ethynylene-3,6- and 2,7-carbazolylene polymers (CALIX-PPE-CBZs) have been synthesized for the first time and their photophysical properties evaluated. Both polymers were obtained in good isolated yields (70-84%), having M-w ranging from 7660-26,700 g mol(-1). It was found that the diethynyl substitution (3,6- or 2,7-) pattern on the carbazole monomers markedly influences the degree of polymerization. The amorphous yellow polymers are freely soluble in several nonprotic organic solvents and have excellent film forming abilities. TG/DSC analysis evidences similar thermal behaviors for both polymers despite their quite different molecular weight distributions and main-chain connectivities (T-g, in the range 83-95 degrees C and decomposition onsets around 270 degrees C). The different conjugation lengths attained by the two polymers dictates much of their photophysical properties. Thus, whereas the fully conjugated CALIX-PPE-2,7-CBZ has its emission maximum at 430 nm (E-g = 2.84 eV; Phi(F) = 0.62, CHCl3), the 3,6-linked counterpart (CALIX-PPE-3,6-CBZ) fluoresces at 403 nm with a significant lower quantum yield (E-g = 3.06 eV; Phi(F) = 0.31, CHCl3). The optical properties of both polymers are predominantly governed by the intrachain electronic properties of the conjugated backbones owing to the presence of calix[4]arenes along the polymer chain which disfavor significant interchain interactions, either in fluid- or solid-state.por
dc.identifier.citationBARATA, P. D.; COSTA, A. I.; PRATA, J. V. – Calix[4]Arene-Carbazole-Containing Polymers: Synthesis and properties. Reactive & Functional Polymers. ISSN: 1381-5148. Vol. 72, nr. 9 (2012), pp. 627-634por
dc.identifier.doi10.1016/j.reactfunctpolym.2012.06.006
dc.identifier.issn1381-5148
dc.identifier.urihttp://hdl.handle.net/10400.21/5096
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science BVpor
dc.relationFundação para a Ciência e a Tecnologia/MCTES (Portugal) - PTDC/QUI/66663/2006
dc.relationFundação para a Ciência e a Tecnologia/MCTES (Portugal) - PEst-OE/EQB/UI0702/2011
dc.relation.ispartofseries9
dc.subjectCalixarenepor
dc.subjectCarbazolepor
dc.subjectArylene ethynylenepor
dc.subjectPolymerpor
dc.subjectFluorescencepor
dc.subjectFluorescence
dc.subjectContaining conjugated
dc.subjectOptical-properties
dc.subjectSensors
dc.subjectFilms
dc.subjectChemosensors
dc.subjectSwitches
dc.subjectState
dc.titleCalix[4]arene-carbazole-containing polymers: synthesis and propertiespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdam
oaire.citation.endPage634por
oaire.citation.issue9por
oaire.citation.startPage627por
oaire.citation.titleReactive & Functional Polymerspor
oaire.citation.volume72por
person.familyNameBarata
person.familyNameCosta
person.familyNamePrata
person.givenNamePatrícia
person.givenNameAlexandra
person.givenNameJosé Virgílio
person.identifier1090399
person.identifier191765
person.identifier.ciencia-idC019-9F30-0F99
person.identifier.ciencia-id4212-F7BF-D971
person.identifier.ciencia-idC11A-9130-8981
person.identifier.orcid0000-0001-8274-633X
person.identifier.orcid0000-0002-5518-6506
person.identifier.orcid0000-0002-9068-2847
person.identifier.ridB-7214-2008
person.identifier.scopus-author-id8968446000
person.identifier.scopus-author-id8968446100
person.identifier.scopus-author-id9276778400
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication4ab8a01f-c11d-4b3b-b0cf-b21e5b634170
relation.isAuthorOfPublication5f3891cc-260d-41d3-b803-4fd17e3734bd
relation.isAuthorOfPublication15e229f3-a619-4931-87eb-799091dc1601
relation.isAuthorOfPublication.latestForDiscovery5f3891cc-260d-41d3-b803-4fd17e3734bd

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