Synthesis,Characterization And Properties Of Metal Coordination Complex Derived From Aromatic Carboxylic Acid/Sulfonate Ligands

The thesis is concern about the synthesis,characterization and properties of metal coordination complex derived from aromatic carboxylic acid/phenyl sulfonate ligands.We successfully synthesized seventeen novel metal complexes by means of hydrothermal condition and further characterized by X-ray single crystal diffraction,elemental analysis,IR,PXRD and TG.The results are summarized as follows.First,the construction of metal coordination complex derived from flexible aromatic di-carboxylic acid ligands is investigated.We successfully constructed six new metal coordination complexes under hydrothermal condition,by reacting six different transition metal salts with one kind of aromatic dicarboxylic acids organic ligands(3-(carboxymethoxy)-2-naphthoic acid)and structurally characterized.Additionally,the fluorescent properties are also investigated.These results suggest that both the coordination preferences of the metal ions and the organic ligand play a critical role in the final structures.Meanwhile,the present protocol demonstrates a new example for the formation of metal coordination polymers with different structure motifs,which are obtained through a flexible aromatic di-carboxylic acid ligands.Second,on the basis of 1,3-di(pyridin-4-yl)propane as organic ligand,reacting with cobalt cation containing phenyl sulfonate,three new phenyl sulfonate metal coordination polymers were obtained under similar hydrothermal conditions and characterized using X-ray single-crystal diffraction.In view of MCPs containing a phenyl sulfonate group and transition metal ions,the primary catalytic reaction,the Biginelli reaction,was examined.These three new coordination polymers have been applied as catalysts for the green synthesis of a variety of dihydropyrimidinones under solvent-free conditions.Finally,the catalysis products have been obtained in high yields under eco-friendly synthesis conditions.Finally,on the basis of 2-(1H-benzotriazol-1-yl)acetic acid as organic ligand,we successfully constructed eight new metal coordination complexes under hydrothermal,by reacting with eight different metal salts.These complexes all display low-dimensional features displaying various zero-dimensional(0D),one-dimensional(1D),and two-dimensional(2D)coordination motifs.Complexes 10 and 11 are isostructural and mononuclear;Complex 12 shows a bi-nuclear structure.Complex 13,14 and 15 display a 1D tape structure.Complex 16 and 17 exhibit a 2D layer.They all further extend to a 3D supramolecular architecture through intermolecular hydrogen bonds and other weak interactions.These results suggest that both the coordination preferences of the metal ions and the organic ligand play a critical role in the final structures.The luminescent spectra show strong emission intensities in complexes 12,13,14,and 15.Complexes 12,14 and 15 display blue photoluminescence.However,complex 13 exhibits green fluorescence.Variable-temperature magnetic susceptibility measurements reveal the existence of antiferromagnetic interactions in both 16 and 17.