Síntese e caracterização de derivados de polipirrol para aplicação em dispositivos eletroquímicos

Detalhes bibliográficos
Ano de defesa: 2010
Autor(a) principal: Nogueira, Fred Augusto Ribeiro
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Alagoas
BR
Química; Biotecnologia
Programa de Pós-Graduação em Química e Biotecnologia
UFAL
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufal.br/handle/riufal/1097
Resumo: In this study was studied the capacitive properties of films poly (12-pyrrol-1 yl dodecanoic acid) and electrochromic properties of films poly [1 - (3-brominepropylpyrrole)] prepared by electrochemical methods and deposited on ITO. The polymers were obtained using electrochemical methods and characterized by electrochemical, morphological and optical techniques. Cyclic voltammograms of both polymers showed the presence of a redox couple attributed to the doping-undoped process the polymer. The analysis by infrared spectroscopy for poly (12-pyrrol-1 yl dodecanoic acid) suggested the coupling of the monomers through the alpha positions. The capacitive properties of a poly (12-pyrrol-1 yl dodecanoic acid) were investigated by calculation of the coulombic efficiency (86.6%) and specific capacitance (291 F g-1) obtained from the charge-discharge curves of films obtained by galvanostatic method. The values obtained for these parameters demonstrated the possibility of applications of these films in capacitive devices. The UV-Vis spectra for films of poly [1 - (3-brominepropylpyrrole)] showed absorption bands at  = 335 and 500 nm. The films of poly [1 - (3-brominepropylpyrrole)] show variations in color depending on the applied potential. The electrochromic properties of these films were investigated by calculation of chromatic contrast (18.97 and 20.46 %), coulombic efficiency (61.1%), and electrochromic (248.6 and 470.2 cm2 C-1). The values obtained for these parameters demonstrated the possibility of applications of these films in electrochromic devices