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Chiroptical and emissive properties of a calix[4]arene-containing chiral poly (P-phenylene ethynylene) with enantioselective recognition ability

2014-10Journal article Restricted access
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dc.contributor.authorPrata, José Virgílio
dc.contributor.authorCosta, Alexandra
dc.contributor.authorPescitelli, Gennaro
dc.contributor.authorPinto, Hugo D.
dc.date.accessioned2015-08-24T10:23:16Z
dc.date.available2015-08-24T10:23:16Z
dc.date.issued2014-10
dc.description.abstractSupramolecular chirality was achieved in solutions and thin films of a calixarene-containing chiral aryleneethynylene copolymer. The observed chiroptical activity, which is primarily allied with the formation of aggregates of high molecular weight polymer chains, is the result of a combination of intrachain and interchain effects. The former arises by the adoption of an induced helix-sense by the polymer main-chain while the latter comes from the exciton coupling of aromatic backbone transitions. The co-existence of bulky bis-calixKlarene units and chiral side-chains on the polymer skeleton prevents efficient pi-stacking of neighbouring chains, keeping the chiral assembly highly emissive. In contrast, for a model polymer lacking calixarene moieties, the chiroptical activity is dominated by strong interchain exciton couplings as a result of more favourable packing of polymer chains, leading to a marked decrease of photoluminescence in the aggregate state. The enantiomeric recognition abilities of both polymers towards (R)- and (S)-alpha-methylbenzylamine were examined. It was found that a significant enantiodiscrimination is exhibited by the calixarene-based polymer in the aggregate state.por
dc.identifier.citationPRATA, José Virgílio Coelho; [et al] – Chiroptical and emissive properties of a Calix[4]Arene-containing chiral poly (P-Phenylene Ethynylene) with enantioselective recognition ability. Polymer Chemistry. ISSN: 1759-9954. Vol. 5, nr. 19 (2014), pp. 5793-5803por
dc.identifier.doi10.1039/c4py00729h
dc.identifier.issn1759-9954
dc.identifier.issn1759-9962
dc.identifier.urihttp://hdl.handle.net/10400.21/4926
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherRoyal Society of Chemistrypor
dc.subjectContaining Conjugated Polymerspor
dc.subjectSolid-Statepor
dc.subjectThin-Filmspor
dc.subjectPoly(phenylene Ethynylene)por
dc.subjectOptical-Propertiespor
dc.subjectChemical Sensorspor
dc.subjectFluorescencepor
dc.subjectPoly(aryleneethynylene)spor
dc.subjectPhotophysicspor
dc.subjectAggregationpor
dc.titleChiroptical and emissive properties of a calix[4]arene-containing chiral poly (P-phenylene ethynylene) with enantioselective recognition abilitypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceCambspor
oaire.citation.endPage5803por
oaire.citation.issue19por
oaire.citation.startPage5793por
oaire.citation.titlePolymer Chemistrypor
oaire.citation.volume5por
person.familyNamePrata
person.familyNameCosta
person.familyNamePescitelli
person.givenNameJosé Virgílio
person.givenNameAlexandra
person.givenNameGennaro
person.identifier191765
person.identifier.ciencia-idC11A-9130-8981
person.identifier.ciencia-id4212-F7BF-D971
person.identifier.orcid0000-0002-9068-2847
person.identifier.orcid0000-0002-5518-6506
person.identifier.orcid0000-0002-0869-5076
person.identifier.ridB-7214-2008
person.identifier.ridG-3536-2010
person.identifier.scopus-author-id9276778400
person.identifier.scopus-author-id8968446100
person.identifier.scopus-author-id56633554900
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication15e229f3-a619-4931-87eb-799091dc1601
relation.isAuthorOfPublication5f3891cc-260d-41d3-b803-4fd17e3734bd
relation.isAuthorOfPublication57fa5121-e7a4-46ca-b06f-1a483cf8bc5a
relation.isAuthorOfPublication.latestForDiscovery57fa5121-e7a4-46ca-b06f-1a483cf8bc5a

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