Synthesis, structure and thermal decomposition behavior of coordination compound with 4, 4′-di(4H-1, 2, 4- triazazole-4-yl)-1, 1′-biphenyl and Zn(Ⅱ)

Abstract

In order to improve the thermal stability of coordination compound with triazole derivative, a new coordination compound, [Zn(dtb)Cl2]·2H2O (1), was synthesized by 4, 4′-di(4H-1, 2, 4-triazazole-4-yl)-1, 1′-biphenyl (dtb) and Zn2+ in a mixed solvent of water and acetonitrile with solvothermal method. The structure and physicochemical properties of compound 1 were studied by X-ray single crystal diffractometer, infrared spectrometer, thermogravimetric analyzer and ultraviolet spectrophotometer. The results show that compound 1 belongs to the monoclinic crystal system, I12/a1 space group. And these cell parameters are respectively a=1.073 031(13)nm, b=1.387 946(18)nm, c=1.300 051(16)nm, α=γ=90°, β=93.7511(11)°, V=1.932 03(4)nm3. Compared with the dtb ligand, the ultraviolet-visible absorption position of compound 1 has a significant red shift.TG experiment reveals that compound 1 occupies excellent thermal stability compared with the dtb ligand and other compounds with triazole derivative.

Keywords

• 4,4′-di(4h-1,2,4-triazazole-4-yl)-1,1′-biphenyl
• solvothermal method
• crystal structure
• thermogravimetric analysis