Artículos de revistas
Solid-state NMR characterization of a series of copolymers containing fluorene, phenylene and thiophene units
Fecha
2011Registro en:
POLYMER TESTING, v.30, n.3, p.342-347, 2011
0142-9418
10.1016/j.polymertesting.2011.02.003
Autor
NOWACKI, Bruno
AZEVEDO, Eduardo Ribeiro de
AKCELRUD, Leni
Institución
Resumen
Fluorene and thiophene units are commonly used in polymeric materials for electro-optical applications. Due to differences in reactivity, the final composition of polymers containing these components often differs from that used in their preparation. This contribution describes the synthesis of PPV type terpolymers built by fluorene, phenylene and thiophene units and their quantification by CPMAS NMR. The similarity of the three aromatic co-monomers makes it difficult to separate the analytical responses that would allow quantification of each copolymer unit in the chain. In this sense, we show that the combination of dipolar dephased CPMAS with radiofrequency ramp and proper spectral treatment allows a good estimation and quantification of the copolymer constitution. (C) 2011 Elsevier Ltd. All rights reserved.