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Solid-state sensory properties of Calix-Poly(Phenylene Ethynylene)s toward nitroaromatic explosives

dc.contributor.authorCosta, Alexandra
dc.contributor.authorPinto, Hugo D.
dc.contributor.authorFerreira, Luís F. V.
dc.contributor.authorPrata, José Virgílio
dc.date.accessioned2015-09-08T15:31:40Z
dc.date.available2015-09-08T15:31:40Z
dc.date.issued2012-01-03
dc.description.abstractThis study is primarily focused in establishing the solid-state sensory abilities of several luminescent polymeric calix[4]arene-based materials toward selected nitroaromatic compounds (NACs), creating the foundations for their future application as high performance materials for detection of high explosives. The phenylene ethynylene-type polymers possessing bis-calix[4]arene scaffolds in their core were designed to take advantage of the known recognition abilities of calixarene compounds toward neutral guests, particularly in solid-state, therefore providing enhanced sensitivity and selectivity in the sensing of a given analyte. It was found that all the calix[4]arene-poly(para-phenylene ethynylene)s here reported displayed high sensitivities toward the detection of nitrobenzene, 2,4-dinitrotoluene and 2,4,6-trinitrotoluene (TNT). Particularly effective and significant was the response of the films (25-60 nm of thickness) upon exposure to TNT vapor (10 ppb): over 50% of fluorescence quenching was achieved in only 10 s. In contrast, a model polymer lacking the calixarene units showed only reduced quenching activity for the same set of analytes, clearly highlighting the relevance of the macrocyclics in promoting the signaling of the transduction event. The films exhibited high photostability (less than 0.5% loss of fluorescence intensity up to 15 min of continuous irradiation) and the fluorescence quenching sensitivity could be fully recovered after exposure of the quenched films to saturated vapors of hydrazine (the initial fluorescence intensities were usually recovered within 2-5 min of exposure to hydrazine).por
dc.identifier.citationCOSTA, A. I.; [et al] – Solid-state sensory properties of Calix-Poly(Phenylene Ethynylene)s toward nitroaromatic explosives. Sensors and Actuators B-Chemical. ISSN: 0925-4005. Vol. 16, nr. 1 (2012), pp. 702-713por
dc.identifier.doi10.1016/j.snb.2011.11.017
dc.identifier.issn0925-4005
dc.identifier.urihttp://hdl.handle.net/10400.21/5122
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science SApor
dc.relationFundação para a Ciência e a Tecnologia/MCTES (Portugal) - PTDC/QUI/66663/2006
dc.subjectCalixarenespor
dc.subjectConjugated Polymerspor
dc.subjectPhenylene Ethynylenepor
dc.subjectFluorescencepor
dc.subjectSolid-State Sensorspor
dc.subjectExplosivespor
dc.subjectFluorescent Conjugated Polymers
dc.subjectChemical Sensors
dc.subjectTNT Chemosensors
dc.subjectFilms
dc.subjectPhotoluminescence
dc.subjectTrinitrotoluene
dc.subjectCopolymer
dc.subjectDesign
dc.titleSolid-state sensory properties of Calix-Poly(Phenylene Ethynylene)s toward nitroaromatic explosivespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceLausanne
oaire.citation.endPage713por
oaire.citation.issue1por
oaire.citation.startPage702por
oaire.citation.titleSensors and Actuators B-Chemicalpor
oaire.citation.volume16por
person.familyNameCosta
person.familyNamePrata
person.givenNameAlexandra
person.givenNameJosé Virgílio
person.identifier191765
person.identifier.ciencia-id4212-F7BF-D971
person.identifier.ciencia-idC11A-9130-8981
person.identifier.orcid0000-0002-5518-6506
person.identifier.orcid0000-0002-9068-2847
person.identifier.ridB-7214-2008
person.identifier.scopus-author-id8968446100
person.identifier.scopus-author-id9276778400
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication5f3891cc-260d-41d3-b803-4fd17e3734bd
relation.isAuthorOfPublication15e229f3-a619-4931-87eb-799091dc1601
relation.isAuthorOfPublication.latestForDiscovery15e229f3-a619-4931-87eb-799091dc1601

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