Artículos de revistas
Correlations between Conjugation Length, Macromolecular Dynamics, and Photophysics of Phenylene-Vinylene/Aliphatic Multiblock Copolymers
Registro en:
Journal of Physical Chemistry B. Amer Chemical Soc, v.116, n.20, p.5993-6002, 2012
1520-6106
WOS:000304338300021
10.1021/jp2117517
Autor
Bernardinelli, O. D.
Cassemiro, S. M.
Nunes, L. A. O.
Atvars, T. D. Z.
Akcelrud, L.
deAzevedo, E. R.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) This work reports a detailed spectroscopy study of a series of multiblock conjugated nonconjugated copolymers built by p-phenylene vinylene type units (PV) and octamethylene spacers, namely, poly(1,8-octanedioxy-2,6-dimethoxy-1,4-phenylene-1,2-ethenylene) (LaPPS18). The relative proportions of the PV and aliphatic segments were estimated on the basis of solid-state NMR and Raman spectroscopy. The overall structure was characterized by wide angle X-ray diffraction; H-1 wide-line dipolar chemical shift correlation (DIPSHIFT), and centerband-only detection of exchange (CODEX) NMR data, that together with glass transition temperatures allowed us to identify the groups involved in the molecular dynamics. These different structural properties were used to explain the photoluminescence properties in terms of peak position and spectral profile 116 20 5993 6002 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) National Institute of Electronic Organics (FAPESP/CNPq/MCT) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)