Synthesis, Structure And Properties Of New Inorganic-organic Hybrid Complexes Constructed From Polycarboxylate Ligands And Metal Ions

The aim of this thesis is the synthesis of new inorganic-organic hybrid complexes on the basis of four organic polycarboxylate ligands:1,2,4-benzenetricarboxylate, pizine-2-carboxylate,1,1'-biphenyl-2,2'-dicarboxylate, iminodiacetic acid and transitional metal ions, rare earth metal ions. With molecular design and self assemble theory, we synthesized 4 new inorganic-organic hytbrid complexes with two-dimensional and three-dimensional structures. At the same time, we discussed the reaction regulation of this kind of complexes. We characterized the above complexes with elemental analysis,IR, TG and single crystal X-ray diffractions.The thermal stabilities of these compounds had been studied.1.Based on asymmetry polycarboxylic acid and transition metal ions, we synthesized 2 new inorganic-organic hytbrid complexes with three-dimensional structures under hydrothermal condition.Complex 1 is a three-dimensional network built from tetranuclear Zn (â…¡) building unit. In this complex, the Zn₄ unit is an eight-connected knot, while 1,2,4-BTC acts as a four-connected knot. This results in a CaF₂ topology network. Complex 2 is a two-fold interpenetration diamond copolopy.2.Under hydrothermal conditions, we use 1,1'-biphenyl-2,2'-dicarboxylate acid, metal ion and synthesize one new inorganic-organic hytbrid complexe. Furthermore, we studied the physical properties.Complex 3 is an three-dimensiona covalent network constructed meso-helical chains.3. We use iminodiacetic acid and transitional metal ion, rare earth metal ion and synthesize one new inorganic-organic hytbrid complex under hydrothermal condition.Complex 4 is a two-dimensional layer structure, in which the Ce(â…¢) center is surrounded by ten oxygen atoms from different IDA ligands, Co(â…¡) center is six-coordinated by four oxygen atoms and two nitrogen atoms from two different IDA ligands. Carboxylic oxygen atom connected such units along c axis to form a one-dimensional chain-like structure. The IDA ligand connects neighboring chains to form two-dimensional layer structure.