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Conjugation Length Distribution in Poly(p-phenylenevinylene) (PPV) Films.
da Silva, Marcelo C; Cassemiro, Sandra de M; Machado, Angelita M; Alves, Joniel C F; Nogueira, Sandra L; Jarrosson, Thibault; Serein-Spirau, Françoise; Akcelrud, Leni; Tozoni, José R; Silva, Raigna A; Freire, José A; Marletta, Alexandre.
Afiliação
  • da Silva MC; Center for Biological and Natural Sciences, Federal University of Acre , Rio Branco, Acre 69920-900, Brazil.
  • Cassemiro SM; Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Paraná , Curitiba, Paraná 80060-000, Brazil.
  • Machado AM; Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Paraná , Curitiba, Paraná 80060-000, Brazil.
  • Alves JC; Departamento de Física, Universidade Federal do Paraná , Curitiba, Paraná 80060-000, Brazil.
  • Nogueira SL; Equipe Architectures Moléculaires et Matériaux Nanostruturés (AM2N), Institut Charles Gerhardt, ENSCM, 34090 Montpellier, France.
  • Jarrosson T; Equipe Architectures Moléculaires et Matériaux Nanostruturés (AM2N), Institut Charles Gerhardt, ENSCM, 34090 Montpellier, France.
  • Serein-Spirau F; Equipe Architectures Moléculaires et Matériaux Nanostruturés (AM2N), Institut Charles Gerhardt, ENSCM, 34090 Montpellier, France.
  • Akcelrud L; Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Paraná , Curitiba, Paraná 80060-000, Brazil.
  • Tozoni JR; Institute of Physics, Federal University of Uberlândia , Uberlândia, Minas Gerais 38408-100, Brazil.
  • Silva RA; Institute of Physics, Federal University of Uberlândia , Uberlândia, Minas Gerais 38408-100, Brazil.
  • Freire JA; Departamento de Física, Universidade Federal do Paraná , Curitiba, Paraná 80060-000, Brazil.
  • Marletta A; Institute of Physics, Federal University of Uberlândia , Uberlândia, Minas Gerais 38408-100, Brazil.
J Phys Chem A ; 120(49): 9702-9706, 2016 Dec 15.
Article em En | MEDLINE | ID: mdl-27973811
We studied the absorption line-shape of poly(p-phenylenevinylene) (PPV) films deposited via spin coating and Langmuir-Blodgett techniques with the intent of identifying the conjugation length distribution in these two types of films, a key morphological aspect of conjugated polymer films. We treated the excitons in the polymer as independent oligomer excitons and modeled the absorption spectra of the individual oligomers using simple expressions for the oligomer size dependence of the gap energy, the line-broadening factor, the transition dipole moment and the Huang-Rhys parameter. We validated these expressions by independent measurements on phenyl-based oligomers and Density Functional Theory calculations. Our results show clear evidence that, for both types of PPV films, the conjugation length distribution depends exponentially on the segment size. Our results also set a lower limit, of about ten repeat units, for the maximum exciton length of three different phenyl-based oligomers.
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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Phys Chem A Assunto da revista: QUIMICA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Buscar no Google
Adicionar na Minha BVS
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PubMed Links

Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: J Phys Chem A Assunto da revista: QUIMICA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos