Synthesis of a novel organic nonlinear optical chromophore and the Testing for μgβ Value

A novel second-order nonlinear optical chromophore (DCDHF-2-V) was synthesized from 3-Hydroxy-3-methyl-2-butanae,propanedinitrile and 4-diethylaminobenzaldehyde by aldol condensation reaction. Molecular structural characterization was investigated by elemental analysis,FTIR,and 1H-NMR spectra. The melting point obtained from DSC thermogram was almost 251 ℃,and the compound shows a thermal stability up to 270 ℃. Second-order NLO properties of the chromophore were measured by solvatochromic method. From the quantum-mechanical two-level model,it can be obtained that the μgβ value of DCDHF-2-V is 6520 × 10-48 esu atthe wavelength of 1064 nm.