Synthesis, Crystal Structure and Third-Order Nonlinear Optical Behavior of a Novel Dimeric Mixed-Ligand Zinc(II) Complex of 1,3-Dithiole-2-thione-4,5-dithiolate

摘要

The first dimeric mixed-ligand zinc(II) complex of 1,3-dithiole-2-thione-4,5-dithiolate (dmit) [Zn(dmit)(2,2'-bpy)]_2 (2,2'-bpy = 2,2'-bipyridine) (1), which exhibits a good third-order nonlinear refraction effect, was synthesized by a ligand exchange reaction between [(Et_4N)_2Zn(dmit)_2] and [Cu(2,2'-bpy)(NO_3)_2]·2H_2O. A Z-scanning measurement of complex 1 gives the third-order nonlinear refraction index n_2 = 3.72 * 10~(-18) m~2/W and the real part ReX~((3))=1.01 * 10~(-12)esu. Crystal data for 1: monoclinic, P2_1/c (No.14), a = 11.556(2) A, b = 9.141(2) A, c = 15.020(3) A, β = 109.55(3)°, Z = 4.