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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Correlations between Conjugation Length, Macromolecular Dynamics, and Photophysics of Phenylene-Vinylene/Aliphatic Multiblock Copolymers

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Bernardinelli, O. D. [1] ; Cassemiro, S. M. [2] ; Nunes, L. A. O. [1] ; Atvars, T. D. Z. [3] ; Akcelrud, L. [2] ; deAzevedo, E. R. [1]
Total Authors: 6
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil
[2] Univ Fed Parana, Paulo Scarpa Polymer Lab, BR-81531990 Curitiba, PR - Brazil
[3] State Univ Campinas Unicamp, Inst Chem, BR-13084971 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Physical Chemistry B; v. 116, n. 20, p. 5993-6002, MAY 24 2012.
Web of Science Citations: 5

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 (AU)

FAPESP's process: 09/18354-8 - Dynamics and structure of polymer systems as studied by nuclear magnetic resonance
Grantee:Eduardo Ribeiro de Azevedo
Support type: Regular Research Grants
FAPESP's process: 09/14153-8 - Photophysics and electroluminescence of organic polymer and dyes
Grantee:Teresa Dib Zambon Atvars
Support type: Regular Research Grants