Synthesis, crystal structure and two-photon absorption of a cadmium complex constructed by DMIT ligand

The cadmium complex [(CH3)4N][Cd(C3S5)2]·H2O constructed by 1,3-dithiole-2-thione-4,5-dithiolato (DMIT) ligand has been synthesized and its structure has been determined by means of X-ray single crystal diffraction. Its two-photon absorption (TPA) has been studied in acetonitrile solution using open-aperture Z-scan technique with 20 picosecond (ps) pulses at wavelength 1064 nm. Its TPA coefficient β was determined to be 4.475 × 10−10 m/W, corresponding the TPA cross-section σ2 is 3.95 × 10−53 (m4 s/photon molecule).