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Type: Artigo
Title: Correlations between conjugation length, macromolecular dynamics, and photophysics of phenylene-vinylene/aliphatic multiblock copolymers
Author: Bernardinelli, O. D.
Cassemiro, S. M.
Nunes, L. A. O.
Atvars, T. D. Z.
Akcelrud, L.
Azevedo, E. R. de
Abstract: 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; 1H 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
Subject: Copolímeros
Country: Estados Unidos
Editor: American Chemical Society
Rights: Fechado
Identifier DOI: 10.1021/jp2117517
Date Issue: 2012
Appears in Collections:IQ - Artigos e Outros Documentos

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