Synthesis, Structure And Properties Of Coordination Polymer Based On Trimesic Acid And Zn/Cd

By using the principle of the crystal engineering to design and set a coordination polymers has become one of the most popular research areas in academic research. This is because the coordination polymers not only shows its fickle topology, but also has potential application value in catalysis, magnetic, fluorescence, drugs, gas storage and separation, thus caused the researchers attention from all research worker both at home and abroad. As is known to all, the structure of coordination polymer depends on metal ions and organic ligands and synthesis methods, etc., so in the design and synthesis of coordination compounds, choosing the appropriate metal ions, organic ligand and have suitable functional groups is very important. Up to now, people use flexible or rigidity aromatic carboxylic acid ligand was synthesized all kinds of complexes, in most of the time, all sorts of nitrogen heterocyclic ligand also plays a very important role in connecting. The trimesic contains three carboxyl, their site can match way through a variety of ligand and metal complexes with different ligand synthesis structure. This thesis select trimesic acid as carboxylic ligand, a variety of nitrogen heterocyclic ligand and transition metal ions zinc(Zn2+), cadmium(Cd2+) under hydrothermal conditions synthesis nine coordination polymers, and by using elemental analysis, fluorescence spectroscopy, infrared spectrum analysis, ultraviolet spectrum analysis, thermal analysis and X-ray single crystal diffraction, XRD- powder diffraction analysis test on the structure and performance characterization.1. In this paper we choose trimesic acid as ligand, four types of nitrogen heterocyclic ligands(dpe AA48 AA50, bpb) as the auxiliary ligands, with transition metal zinc(II)as a metal center, select the appropriate response environment and conditions, five new complexes have synthesized: {[Zn(HL)(dpe)] ?H2O}n(1)、{[Zn2L(dpe)(OH)(H2O)] ?2.5H2O}n(2)、{[Zn1.5L(AA50)(H2O)2] ? 0.5 H2O}n(3)、{[Zn3L2(AA48)2(H2O)2] ? 2H2O}n(4)、{[Zn(HL)(bpb)] ?H2O}n(5). We use a variety of technology on the structure and properties of them makes a preliminary inquiry. five complexes have three-dimensional structure, among them 1, 2, 5 which are further linked to form 3D supramolecular net structures via intermolecular hydrogen bonds. In addition to the 4, all of they have good fluorescence properties; all of complexes have good thermal stability.2. In this paper we choose trimesic acid as ligand, four types of nitrogen heterocyclic ligands(dpe AA48 AA47, bpb) as the auxiliary ligands, with transition metal Cd(II) as a metal center, select the appropriate response environment and conditions, four cases of novel synthesized complexes: {[Cd(HL)(dpe)0.5(H2O)] ? H2 O }n(6) 、 {[Cd3L2(AA48)1.5(H2O)6] ?6H2O}n(7) 、 [Cd(HL)(AA47)] n(8){[Cd(HL)1.5(bpb)] ?0.5(bpb)}n(9). We use a variety of technology on the structure and properties of them makes a preliminary inquiry. Studies have shown that complexes of two-dimensional shown in 6 and 7, which are further linked to form 3D supramolecular net structures via intermolecular hydrogen bonds, complexes 8, 9 with two-dimensional structure, all four complexes have well fluorescence properties and thermal stability.