INVESTIGADORES
GARAY Raul Oscar
artículos
Título:
Chemosensing of nitroaromatics with a new segmented conjugated quaterphenylene polymer
Autor/es:
DEL ROSSO, P. G.; ALMASSIO, M. F.; GARAY, R. O.
Revista:
TETRAHEDRON LETTERS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2011 vol. 52 p. 4911 - 4915
ISSN:
0040-4039
Resumen:
A new approach for introducing porosity in fluorescent polymer films to increase sensing performance is presented. A novel segmented conjugated polymer composed of p-quaterphenylene segments tethered by their meta positions along the polymer main chain by 2,2-isopropylene spacers was synthesised. The bent nature of its microstructure originates amorphous morphologies that let analytes diffuse rapidly within the films. Fluorescence quenching studies with polymer films and methanol solutions of nitroaromatics showed high sensitivity, fast response and reversibility of the fluorescence quenching. Thus, half of the maximum quench (Q50%) occurred with nitrobenzene at the micromolar range in less than one minute in a reversible manner.
