Preparation and Properties of Zinc Complexes Based on 4,4'-Bipyridine Ligands
[Zn(ipa)(4,4'-bipy)·H2O]n(1)was prepared by solvothermal synthesis.Zinc complex 1 was synthesized from zinc nitrate hexahydrate(Zn(NO3)2·6H2O,isophthalic acid(H2ipa),DMF(N,N'-dimethylformamide)and 4,4'-bipyridine(4,4'-bpy)under solvothermal conditions.Their structures were characterized by single crystal X-ray diffraction,Fluorescence spectroscopy(FL),Powder X-ray diffraction(PXRD),infrared spectroscopy(FT-IR)and thermogravimetric analysis(TGA).In complex 1,Zn(No3)2 forms a six-coordinated twisted octahedral structure with the N atom of 4,4'-bipyridine and the carboxyl O atom of ipa2-anion,which further expands to form a three-dimensional Zn(Ⅱ)metal-organic framework(MOF)with pores in which H2O molecules are present.The fluorescence spectra at room temperature show that the complex 1 has the strongest emission peak at 458.6 nm when the excitation wavelength is 365 nm.
solvothermal synthesiscomplexsolid state fluorescence
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