Cz. Cai et al., Donor-acceptor-substituted phenylethenyl bithiophenes: Highly efficient and stable nonlinear optical chromophores, ORG LETT, 1(11), 1999, pp. 1847-1849
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For practical applications of poled electrooptic polymers, highly efficient
and thermally stable nonlinear optical (NLO) chromophores are required. We
describe here a concise synthesis and characterization of a series of dono
r-acceptor chromophores incorporating a bithiophene moiety in the conjugate
d bridge. They display a suitable thermal stability and significantly enhan
ced molecular nonlinearity as compared to their monothiophene analogues and
are among the most efficient yet stable NLO chromophores prepared so far.