Synthesis,Structure And Fluorescent Properties Of Metal Complexes Based On Derivatives Of Benzoic Acid

In recent years, metal-organic frameworks(MOFs) compounds have attracted great interest due to their intriguing structural motifs and potential applications in gas storage, absorption, separation, catalysis, optics and so on. Therefore, it is very importance for the development of coordination chemistry to explore the assembly of metal ion with functional organic ligands to form MOFs and investigate the relationship between the structure and property.In this thesis, ten new cootdination compounds, selecting 3-(3’,5’-dicarboxyl phenyly)-pyridine-3-carboxylic acid,4-(imidazol-1-ylmethyl)benzoic acid, 1-(4-carboxylbenzyl)-3-(pyrzin-2-yl)pyrazole,2,4’-Biphenyldicaorbxylic acid and 5-(3’-carboxylphenyl) nicotic acid as main ligands and 4,4’-bipy,1,10-phen and 1,4-succinic acid as auxiliary ligands respectively, were hydrothermally synthesized. The corresponding formula are as follows:[Ni3(CPIA)2(H2O)12·6H2O]n(1), [Mn3(CPIA)2(H2O)2(4,4’-Bipy)2]n(2), [Ho2(HCPIA)3(H2O)4·5H2O]n(3), [Er2(BDA)3(H2O)2]B(4), [Cd2(imbz)4-2H2O]n(5), [Zn(Bpzpz)2(H2O)2·3H2O]n(6), [Mn(Bpzpz)2(H2O)2·3H2O](7), [Ag(BpzpZ)·2H2O]n(8), [Sm(HBP)(BP)·H2O]n(9), [Cd(CPNA)(phen)·2H2O]n(10). Their structures and properties were characterized by X-ray diffraction analysis, elemental analysis, X-ray power diffraction analysis, IR, solid-state emission specta and TG The single crystal X-ray diffraction analysis show that complexes 8 exhibits one-dimensional chain structure, complexes 1 and 10 possess stair-like two-dimensional structure, complexes 2,5,6,7 and 9 possess two-dimensional layer structures, while complexes 3 and 4 are three-dimensional networks. Solid-state luminescent spectroscopies of compound 2、5、6、7 and 10 exhibit an emission peal at 430 nm、400 nm、415nm、500 nm、440 nm, respectively. Compound 1,2,3,4,5,6,7,8,9 and 10 are all stable, their themal decomposition temprecture are at 400℃、380℃、420 ℃、460℃、350℃、360℃、400℃、300℃、270℃、and 30℃,respectively.