
A cadmium complex complex constructed by the ligand: 1,3-dithiole-2-thione-4,5-dithiolato (DMIT) was synthesized, crystal structure was determined. Third-order nonlinear optical properties have been studied by Z-scan technique with 20 picosecond pulses at wavelength 1064 nm. Cation groups have shielding effect on the third-order nonlinear optical properties for the complexes that constructed by DMIT ligands.