| Texto completo | |
| Autor(es): |
Klider, Karine C. C. W. S.
;
Santos, Fabio S.
;
Peres, Laura O.
;
Wohnrath, Karen
;
Garcia, Jarem R.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the Brazilian Chemical Society; v. 25, n. 3, p. 7-pg., 2014-03-01. |
| Resumo | |
The present work describes an electrochemical method to produce the copolymer poly(2-methoxy-5-bromo-p-phenylenevinylene)/(2,5-dicyano-p-phenylenevinylene) (cop-MB-PPV/DCN-PPV). This copolymer was proposed due to its D-A characteristic produced by the presence of the electron-donating methoxy moiety and the electron-withdrawing dicyano moiety. The copolymer was electrochemically synthetized by cathodic reduction of the convenient starting materials dissolved in a DMF/LiClO4 using a mercury pool acting as working electrode. The copolymer was characterized by infrared (IR), UV-Vis and fluorescence (FL) spectroscopy and cyclic voltammetry (CV). All the results were compared to the MB-PPV homopolymer. The analysis of electrochemical measurements and IR indicated that the cop-MB-PPV/DCN-PPV was obtained through the formation of blocks containing DCN-PPV units linked by blocks containing MB-PPV units. The electronic structure, performed by CV, UV-Vis and FL showed that the conduction band is more stabilized in the copolymer than in homopolymer. Furthermore, the FL spectra indicated that the light emission of the cop-MB-PPV/DCN-PPV in chloroform solution occurs by means of excimer formation. (AU) | |
| Processo FAPESP: | 07/50742-2 - Preparação, caracterização e avaliação de propriedades de polímeros condutores híbridos nano-estruturados em meio não convencional |
| Beneficiário: | Roselena Faez |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |