Qd. Zheng et al., Synthesis and nonlinear optical properties of p-(dimethylamino)benzylidenedyes containing different acceptors, CHEM LETT, (12), 2000, pp. 1426-1427
Several p-(dimethylamino)benzylidene dyes were synthesized and their evalua
tion of beta using Hyper-Rayleigh Scattering (HRS) technique was reported.
The results show that these dyes have enhanced second-order hyperpolarizabi
lities.