Synthesis and Characterization of Cu(II),Co(II) and Ni(II) with 2,2′-dithiobinary Benzoic Acid Complexes

Three transition metal complexes of 2,2′-dithiobinary benzoic acid with Cu(II),Ni(II)and Co(II) were synthesized. Their compositions were identified by using elemental analysis,ICP emission spectrometric analysis and thermogravimetric analysis. The structures of the title complexes were assumed by IR analysis,fluorescence spectroscopy and thermogravimetric analysis. The results show that the complexation molar ratio of M(Cu(II),Ni (II) and Co(II)) to 2,2′-dithiobinary benzoic acid is 1:1,the three transition metal complexes have strong fluorescence properties,and thermal stability of complexes of nickel (Ⅱ) and Cobalt (Ⅱ) are higher than that of copper (Ⅱ).