C. Zhang et al., Synthesis and characterization of sterically stabilized second-order nonlinear optical chromophores, CHEM MATER, 11(8), 1999, pp. 1966
Synthesis and Characterization of Sterically Stabilized Second-Order Nonlin
ear Optical Chromophores Bulky substituents added to second-order nonlinear
optical (NLO) chromophores inhibit in termolecular electrostatic interacti
ons that attenuate electric poling induced macroscopic electrooptic activit
y. Such chromophore modification also improves chemical and photochemical s
tability and the processability of chromophores into hardened, optical-qual
ity polymer materials by improving solubility, We present a new route to th
e synthesis of electrooptic (second-order NLO) chromophores based on steric
ally protected;pi-electron bridge structures, yielding molecules exhibiting
both large optical nonlinearity and good thermal stability.