Synthesis,Structure And Porperties Of Coordination Complexes With Carboxylic Acid Ligands

Coordination complex is a novel kind of molecule-based materials which is constructed by metal ions and organic ligands with 0D, 1D, 2D or 3D networks. As combining the advantages of both inorganic materials and organic materials, they have a lot of potential applications in many fields, such as electricity, magnetism, photochemistry, catalyst and adsportion.In this dissertation, there are 8 new complexes with 6 different organic ligands, indole-3-carboxylic acid, indazole-3-carboxylic acid, 4-imidazoleacrylic acid, tetrazole-1-acetate acid and 6-aminopicolinic acid, by using diffusion synthesis and hydrothermal synthesis. The structure and crystal data of these coordination complexes were characterized by many kinds of analysis methods, such as single crystal X-ray diffraction（XRD）, elemental analysis（EA）, powder X-ray diffraction（PXRD）, infrared ray spectrum（IR） and thermogravimetric analysis（TGA）.Zn²⁺ is connected with Indole-3-carboxylic to form the 1D chains [Zn（Indole-3-carboxylic）₂·H₂O]n which exhibit emission peaks at 320 nm（λex=280 nm）. And its luminescent properties are studied by fluorescence titration and antijamming experiment, and the complex can be used as sensory material for the sensing of various organic solvent. The complex Ni₂（Indazole-3-carboxylic）₂ Cl₂·4Et OH is formed by Indazole-3-carboxylic acid and Ni²⁺ with 0D structure. By added Pyridine-2,6-dicarboxylic, the 1D chain complex [Ni4（Indzole-3-carboxylic）₂（Pyridine-2,6-dicarboxylic）₂Cl₂·4Et OH]n is constructed.Complex Co（4-Imidazole-acrylic）₂·4H₂O is formed by 4-imidazoleacrylic acid and Co²⁺ through diffusion synthesis. 4-imidazoleacrylic acid combined with Cu²⁺, and the 3D network complex [Cu₂（4-Imidazoleacrylic）（SO4）（OH）·2H₂O]n is achieved, which can be simplified as {412; 62} topological structure. And [Cu₂（4-Imidazoleacrylic）（SO4）（OH）·2H₂O]n/reduced graphene oxide（5@r GO） is synthesized, showing a great stability in the electrochemistry. Co²⁺ is linked with tetrazole-1-acetate to form a 3D network, [Co（Tetrazole- 1-acetate）₂]n, which can be simplified as 3,6-connected {4;62}2{42;610;83} topological structure, and the magnetic properties showed weak ferromagnetic coupling between Co²⁺ ions in this complex. Ligand 6-Aminopicolinic acid connected Ni²⁺/Co²⁺ to form 0D structures by different conditions. These results will be helpful to understand the effect on synthesis of coordination complex.