Syntheses And Properties Of Co/Ni-Ln Heterometallic Complexes Based On 3,4-Dichlorobenzoic Acid And 2,2’-Bipyridine

In this paper,by selecting 3,4-dichlorobenzoic acid（3,4-HDCB）as O-donor ligand and 2,2’-bipyridine（2,2’-bpy）as N-donor ligand,by self-assembling of 3,4-DCB,2,2’-bpy,different lanthanide ions,and Co/Ni transition metal ions under solvothermal conditions,fifteen 3d-4f heterometallic complexes were obtained.1.By the reactions of 3,4-DCB,2,2’-bpy,rare earth nitrate,and nickel chloride under solvothermal conditions,eight Ni^II-Ln^III 3d-4f heterometallic complexes[NdNi₂（3,4-DCB）₇（2,2’-bpy）₂]（1）and[Ni₂Ln₂（3,4-DCB）₁₀（2,2’-bpy）₂][Ln=Sm（2）,Eu（3）,Gd（4）,Tb（5）,Dy（6）,Er（7）,Yb（8）]were successfully synthesized.X-ray single-crystal diffraction analysis shows that complexes 1-8 possess three types of different structures.Complexes 2-6 and 7-8 are isostructural,respectively.The luminescent properties of complex 3 and the magnetic properties of complexes 1,2,and4-8 were studied.2.By the reactions of 3,4-DCB,2,2’-bpy,rare earth nitrate,and cobalt nitrate under solvothermal conditions,seven Co^II-Ln^IIIII 3d-4f heterometallic complexes[Co₂Ln₂（3,4-DCB）₁₀（2,2’-bpy）₂][Ln=Nd（9）,Sm（10）,Eu（11）,Gd（12）,Tb（13）,Dy（14）,Er（15）]were synthesized.Complexes 9-15 are isostructural,except that the coordination number of Ln^III in 9–14 is different from that in 15.The luminescent properties of complex 11 and the magnetic properties of complexes 9,10,and 12-15 were investigated.