Evaluation of poly(oligophenylene isopropylene)s as chemosensors of nitroaromatic compounds in aqueous media

MARIA J. ROMAGNOLI; ANA B. SCHVVAL; PABLO G. DEL ROSSO; MARCELA F. ALMASSIO; RAÚL O. GARAY

Mar del Plata

Congreso; SLAP2018. 93. XVI Simposio Latinoamericano de polímeros, XIV Congreso Iberoamericano de polímeros; 2018

Sociedad Argentina de Polimeros

Evaluation of poly(oligophenylene isopropylene)sas chemosensors of nitroaromatic compounds in aqueous mediaMaría J. Romagnoli, Ana B. Schvval, Pablo G. delRosso, Marcela F. Almassio, Raúl O. Garay Departamento de Química/INQUISUR,Universidad Nacional del Sur, Argentinargaray@criba.edu.ar INTRODUCTIONNitro aromatic compound (NAC) sensing is relevant toenvironmental pollution control and security matters. Fluorescent quenching offilms of segmented conjugated polymers (SCPs) is a promising approach fordetection of NACs because their amorphous structures introduce porosity ofmolecular dimensions and reduce any potential p-stacking that usually leads to polymerself-quenching. In previous reports,1,2 we encounter thedifficulties already mentioned by other authors3 in establishingtrends for quenching responses of NACs by fluorescent materials in condensedphase. The present report deals with the picric acid (PA) and trinitrotoluene(TNT) quenching efficiencies in aqueous solution of the fluorescence of films ofpoly(oligophenylene isopropylene)s with either increase polarity (P3MF > P3M> P3) or longer fluorophore length (P5 > P4 > P3).