Detection of microwaves using the organic semiconductor poly(p-phenylenevinylene)
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
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. Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) FAPEMIG Ministério da Ciência, Tecnologia e Inovação do Brasil (MCTI) IMMP/MCT Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPq |
Identificador |
SYNTHETIC METALS, v.160, n.21-22, p.2281-2283, 2010 0379-6779 http://producao.usp.br/handle/BDPI/29856 10.1016/j.synthmet.2010.08.020 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE SA |
Relação |
Synthetic Metals |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE SA |
Palavras-Chave | #Poly(p-phenylenevinylene) #Conversion #Microwave irradiation #CONJUGATED-POLYMER #SENSOR #FILMS #TEMPERATURES #CONVERSION #Materials Science, Multidisciplinary #Physics, Condensed Matter #Polymer Science |
Tipo |
article original article publishedVersion |