Molecular Construction Of The New Polypyridyl Coordination Polymer Materials And Nature

In this thesis, sixteen coordination complexes have been synthesized by the reaction of four flexible bis(pyridyl) ligands L1-L4 with Cu(I) and IIB metal salts, which possess an increasing dimensionality from zero-dimensional (0-D) to one-dimensional (1-D) to two-dimensional (2-D) to three-dimensional (3-D) frameworks, while the reactions of the above ligands with NO3-, ClO4-, HSO4- anion lead to the formation of seven new supermolecular congeries. All the complexes were structurally determined by single crystal X-ray diffraction and some complexes were characterized by element analysis, IR, PL and powder X-ray diffraction. Meanwhile, the "twisted-boat" conformation of Cu4X4 tetramer unit has not been reported so far and the mercury complexes containing left-and right-hand helical chains are also less documented. The cis conformation of these ligands L1-L4 can lead to the formation of discrete complexes while the trans conformation can lead to the formation of infinite coordination networks. The introduction of co-ligand PPh3 molecule results in the formation of low-dimensional Cu(Ⅰ) complex. Compared with NO3-, Br-(Cl-) anions, ClO4- anion tends to construct high-dimensional frameworks with theⅡB meta salts. Copper(Ⅰ) halide cluster complexes, ClO4--inducedⅡB metal complexes and its bis(pyridinium) salt supramolecular network exhibit excellent fluorescent properties, which can be promising as candidate of photoluminescent materials.