Fluorescent Amorphous Distyrylnaphthalene-Based Polymers: Synthesis, Characterization and Thin-Film Nanomolar Sensing of Nitroaromatics in Water

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloUniversidad Nacional del Sures
cic.versioninfo:eu-repo/semantics/publishedVersiones
dc.date.accessioned2019-05-31T17:24:26Z
dc.date.available2019-05-31T17:24:26Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/10021
dc.titleFluorescent Amorphous Distyrylnaphthalene-Based Polymers: Synthesis, Characterization and Thin-Film Nanomolar Sensing of Nitroaromatics in Wateren
dc.typeArtículoes
dcterms.abstractTwo new fluorescent segmented conjugated polymers with either 1,4- or 2,6-distyrylnaphthalene chromophores and their model compounds were synthesized and the chemosensing abilities of the polymeric thin films to detect nitroaromatics (NACs) in aqueous media were evaluated. The structural, thermal and optical properties of the polymers were correlated with those displayed by their corresponding model compounds. Changes in the connectivity of naphthylene units caused minor differences in optical properties, morphology and quenching efficiencies. Molecular modeling highlighted the extremely bent character of polymer microstructures that explains their high solubility and amorphous character. Polymeric films are amorphous, strongly fluorescent and showed remarkable quenching efficiencies in the nanomolar range with picric acid (PA) and trinitrotoluene (TNT). Quenching experiments using either different nitroaromatic quenchers, excitation wavelengths, excitation beam path-lengths, or time of exposure of the film to the quenching solution evidenced the dominant role of inner filter effects (IFE) in the polymer response to NACs in the micromolar range. The sensing response towards PA, a quencher that strongly absorbs at the excitation wavelength, has an IFE contribution even at the nanomolar range, while the response towards the non-absorbing TNT depends only on the quenching occurring after diffusion of the analyte into the film.en
dcterms.creator.authorGaray, Raúl O.es
dcterms.creator.authorSchvval, Ana B.es
dcterms.creator.authorAlmassio, Marcela Fabianaes
dcterms.creator.authorDel Rosso, Paolo G.es
dcterms.creator.authorRomagnoli, María J.es
dcterms.creator.authorMontani, Rosana S.es
dcterms.extent13 p.es
dcterms.identifier.otherdoi:10.3390/polym10121366es
dcterms.identifier.urlRecurso onlinees
dcterms.isPartOf.issuevol. 10, no. 12es
dcterms.isPartOf.seriesPolymerses
dcterms.issued2018-12
dcterms.languageIngléses
dcterms.licenseAttribution 4.0 International (BY 4.0)es
dcterms.subjectsegmented conjugated polymeren
dcterms.subjectamorphousen
dcterms.subjectthin filmsen
dcterms.subjectfluorescent sensoren
dcterms.subjectnitroaromaticsen
dcterms.subjectnanomolar detectionen
dcterms.subject.materiaCiencias Químicases
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