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A novel heterometallic complex constructed by imidazole ligand,CoZn(C3N2H3)4 (1),has been synthesized under hydrothermal conditions.Compound 1 was characterized by IR spectra,thermal analysis,powder X-ray diffraction and single-crystal X-ray diffraction.Single-crystal X-ray diffraction studies reveals that compound 1 is in the tetragonal system,space group I41cd with a =23.4371(5),b =23.4371(5),c =12.4430(7) (A),V=6834.9(4)(A)3,Z =16,C12H12CoN8Zn,Mr =392.60,Dc =1.526 g/cm3,F(000) =3152,μ =2.381 mm-1,R =0.0323 and wR =0.0789.The CoZn(C3N2H3)4 is one-dimensional heterometallic molecular chains,which are further extended into a 3D open framework.Moreover,the solid-state fluorescence property of the complex has also been investigated at room temperature.