INVESTIGADORES
GARAY Raul Oscar
artículos
Título:
Polymerization of 1,4-Bis(tetrahydrothiopheniomethyl)-2-cyano-4-methoxy benzene dibromide: Synthesis of Electronically "Push-Pull" Substituted Poly(para-phenylene vinylene)s
Autor/es:
SARKER, A.; LAHTI, P. M.; GARAY, R. O.; LENZ, R. W.; KARASZ, F.
Revista:
POLYMER
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 1994 vol. 35 p. 1312 - 1316
ISSN:
0032-3861
Resumen:
The base-induced polymerization of
1,4-bis(tetrahydrothiopheniomethyl)-2-cyano-5-methoxybenzene dibromide in
aqueous acetonitrile yields a soluble polyelectrolyte which may be thermally
eliminated to give the electronically 'push-pull' substituted
poly(2-cyano-5-methoxy-l,4-phenylene vinylene). Ultraviolet-visible and
infra-red spectral studies showed production of the conjugated polymer, with a
band gap of ca. 2.6-3.0 eV (410--480 nm) that varied somewhat as a function of
elimination conditions. Elemental analysis indicates some retention of
tetrahydrothiophenium side groups in the polyelectrolyte polymer, despite the
use of a variety of elimination conditions. The retention of side chains in
this synthesis is possibly due to a significant degree of irregularity in the
positions of the cyano and methoxy substituents in the eliminated polymer,
resulting from non-regioselectivity in this polymerization. This reaction demonstrates
the potential in the Wessling process for polymerization of p-xylylenes that
have electronically very asymmetric ('push-pull') substitution patterns.
