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dc.title Photoactive thin films of terphenylene-based amorphous polymers: Synthesis, electrooptical properties, and role of photoquenching and inner filter effects in the chemosensing of nitroaromatics en
dc.type Artículo es
dcterms.abstract New photoactive segmented conjugated polymers with terphenylene chromophores were synthesized, and the chemosensing abilities to detect nitroaromatics compounds (NACs) of the polymeric thin films were evaluated in aqueous media. The thin films are strongly fluorescent, amorphous with no aggregation of the chromophores in the solid state and sensitive towards NACs in water. Though true quenching occurring after diffusion of the NACs into the amorphous films contributes to the total response of these polymer films, quenching efficiencies of nitroaromatics are strongly influenced by additional inner filter effect contributions that could be used to increase the film response. Thus, to maximize the response of these polymers, it is convenient to use the shortest feasible λexc for trinitritoluene (TNT) and the longest feasible λexc for picric acid (PA). In the micromolar concentration region, the highly absorbing PA frequently has a stronger response than TNT due to the inner filter effects (IFE) contributions. However, we observed that the properties of the material, such as exciton mobility or quencher-polymer compatibilities, become more relevant to define the quenching efficiency at the nanomolar range; though the electrondonor capabilities of the chromophores have no bearing on quenching efficiency. So, the tuning of morphology and photophysical properties of the polymer by structural design should be complemented with a rational selection of experimental conditions, e.g., λexc, in order to enhance the response towards the NAC of interest. en
dcterms.issued 2019-11
dcterms.language Inglés es
dcterms.license Attribution-NonCommercial-ShareAlike 4.0 International (BY-NC-SA 4.0) es
dcterms.subject Film chemosensor en
dcterms.subject Terphenylene choromophores en
dcterms.subject Fluorescence quenching en
dcterms.subject Nitroaromatic compounds en
dcterms.subject Aqueous phase en
dcterms.subject Segmented conjugated polymer en
cic.version info:eu-repo/semantics/publishedVersion es Garay, Raúl O. es Del Rosso, Pablo G. es Romagnoli, Maria J. es Almassio, Marcela Fabiana es Schvval, Ana Belén es
cic.lugarDesarrollo Universidad Nacional del Sur es
dcterms.subject.materia Ciencias Químicas es
dcterms.identifier.url Recurso online es
dcterms.identifier.other doi:10.1016/j.jphotochem.2019.112016 R es
dcterms.isPartOf.issue vol. 384 es
dcterms.isPartOf.series Journal of Photochemistry and Photobiology A: Chemistry es
cic.isPeerReviewed true es
cic.isFulltext true es


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