Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Photoluminescence of Solvent-Selected Fluorescent Moieties in MEH-PPV Solutions and Films

Texto completo
Autor(es):
Ribeiro, Antonio C. C. [1, 2] ; Camargo, Henrique S. [1] ; Pereira, Douglas H. [3, 4] ; Custodio, Rogerio [3] ; Martins, Tatiana D. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed Goias, Inst Quim, Campus 2 Samambaia, POB 24242, BR-74690970 Goiania, Go - Brazil
[2] Inst Fed Educ Ciencia & Tecnol, Campus Morrinhos, POB 92, BR-75650000 Morrinhos, Go - Brazil
[3] Univ Estadual Campinas, Inst Quim, POB 6154, BR-13083970 Campinas, SP - Brazil
[4] Univ Fed Tocantins, Campus Gurupi, POB 66, BR-77410530 Gurupi, To - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of the Brazilian Chemical Society; v. 29, n. 3, p. 543-559, MAR 2018.
Citações Web of Science: 0
Resumo

In this work, we examined how photoluminescence in poly{[}2-methoxy-5-(2-ethylhexyloxy)-1,4- phenylenevinylene] (MEH-PPV) is affected by morphology, dictated by the mode of preparation. For that, MEH-PPV dilute solutions in good and non-solvents, thick cast films with poly{[}methylmethacrylate] (PMMA) as inert matrix and spin-coated thin films were prepared. These systems were studied by steady-state and time-dependent fluorescence spectroscopy and electronic microscopy. Unexpected photoluminescent behavior was detected in solutions and films and it was related to different excitons modulated by MEH-PPV conformation. By semi empirical calculations we obtained the singlet and triplet state energies of an MEH-PPV model system and, from time-resolved fluorescence spectroscopy, the existence of short-lived excited states was revealed, enabling us to infer on possible singlet fission in MEH-PPV-based systems. (AU)

Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
Beneficiário:Munir Salomao Skaf
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs