Construction of four 3d-4d/4d complexes based on salen-type schiff base ligands

Through a two-step synthetic strategy, four d(10) Schiff-base complexes CdZn(DMF)(L-a)(NO3)(2) (1), Cd[Zn(L-a)Cl](2)center dot H2O (2) and [Cd(DMF)(LS)-S-b](2)center dot 2H(2)O (S = NO3, 3; Cl, 4) (H2La = N,N'-bis (3-methoxy-salicylidene)phenylene-1,2-diamine, HLb = 2-(1H-benzoimidazol-2-yl)-6-methoxy-phenol) have been successfully constructed by the solvothermal reaction of Cd(NO3)(2)/CdCl2 with Zn(L-a)/Zn(L-b)(2), and characterized by EA, IR, FAB-MS and TG, in which 1, 2 and 4 were confirmed by single crystal X-ray diffraction. The results reveal that 1 is the first 3d-4d hetero-dinuclear compound based on H2La, however, 2 is a CdZn2-type compound reported previously. 3 and 4 are the first examples of dinuclear compounds containing ligand HLb. Moreover, luminescence and biological activities of the four compounds and two ligands H2La/HLb are investigated.