Kj. Moon et al., SYNTHESIS, CHARACTERIZATION AND PROPERTIES OF NLO DYE-CONTAINING POLYURETHANE, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 247, 1994, pp. 91-97
Polyurethane attached hemicyanine dye with tetraphenylborate anion was
synthesized. This polymer was soluble in dimethylformamide and could
be processed into thin film by spin coating. The poled polymer film sh
owed a large second-order nonlinear optical coefficient (chi((2)) = 4.
0 x 10(-7) esu) and good temporal stability.