Artículos de revistas
Detection of microwaves using the organic semiconductor poly(p-phenylenevinylene)
Fecha
2010Registro en:
SYNTHETIC METALS, v.160, n.21-22, p.2281-2283, 2010
0379-6779
10.1016/j.synthmet.2010.08.020
Autor
MARLETTA, Alexandre
NOGUEIRA, Sandra L.
SILVA, R. A.
OLIVEIRA JUNIOR, Osvaldo Novais de
Institución
Resumen
We report a new procedure to convert the polymer precursor poly(xylylidene tetrahydrothiophenium chloride) (PTHT) into poly(p-phenylenevinylene) (PPV) using microwave irradiation. Spin-coated PTHT films were irradiated at room temperature under ambient conditions in a commercial microwave oven, with varying power from 20W to 100W. Complete conversion was reached within only 5 min of irradiation for powers above 50W, yielding PPV films with absorption and photoluminescence spectra that are practically indistinguishable from the spectra of thermally converted PPV films, which require ca. 2 h of a high temperature (similar to 200 degrees C) thermal treatment. In addition to a much faster conversion procedure, the irradiation with microwaves led to a red shift in the absorption spectrum of a PTHT film, which varied linearly with the time of irradiation. These films can then be used as low-cost, easy-to-use detectors of microwaves. (C) 2010 Elsevier B.V. All rights reserved.