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dc.date.accessioned 2019-05-31T17:24:26Z
dc.date.available 2019-05-31T17:24:26Z
dc.identifier.uri https://digital.cic.gba.gob.ar/handle/11746/10021
dc.title Fluorescent Amorphous Distyrylnaphthalene-Based Polymers: Synthesis, Characterization and Thin-Film Nanomolar Sensing of Nitroaromatics in Water en
dc.type Artículo es
dcterms.abstract Two 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.extent 13 p. es
dcterms.issued 2018-12
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.subject segmented conjugated polymer en
dcterms.subject amorphous en
dcterms.subject thin films en
dcterms.subject fluorescent sensor en
dcterms.subject nitroaromatics en
dcterms.subject nanomolar detection en
cic.version info:eu-repo/semantics/publishedVersion es
dcterms.creator.author Garay, Raúl O. es
dcterms.creator.author Schvval, Ana B. es
dcterms.creator.author Almassio, Marcela Fabiana es
dcterms.creator.author Del Rosso, Paolo G. es
dcterms.creator.author Romagnoli, María J. es
dcterms.creator.author Montani, Rosana S. es
cic.lugarDesarrollo Universidad Nacional del Sur es
dcterms.subject.materia Ciencias Químicas es
dcterms.identifier.url Recurso online es
dcterms.identifier.other doi:10.3390/polym10121366 es
dcterms.isPartOf.issue vol. 10, no. 12 es
dcterms.isPartOf.series Polymers es
cic.isPeerReviewed true es
cic.isFulltext true es


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