Synthesis, Structure And Properties Of The Coordination Polymers With Dicarboxylate Ligands

Because of coordination polymers own interesting structures and property, and have a potential application in gas in storage, separation, catalytic properties, thermal stability, optical properties, mechanical properties, magnetic properties and so on. Design and construct coordination polymers have become an interesting research field. Recently, scientists choose carboxylate ligands as main ligand, nitrogen ligands as ancillary ligand have been synthesized lots of coordination polymers Successfully. In this paper, we select dicarboxylate ligands as organic ligand, flexible N-donor ligands bbi as ancillary ligand with metal ions on basis of solvothermal technique synthesized six coordination polymers. The six compounds were structurally characterized by IR, elemental analyses, TG, XRPD and single crystal X-ray diffractions. This thesis is divided into four chapters.Chapter one:A brief introduction the development history and synthetic method of coordination polymers and the structural type, property and application of some significance of compounds are also presented and summarized.Chapter two:two coordination polymers, that is [Co(ip)2]·2CH3OH·2H2O (1) and Pb4(tbip)4(DMF)4-H2O(2) solvothermally synthesized respectively by5-tert-butyl isophthalic acid, isophthalic acid Co(NO3)2-6H2O and Pb(NO3)2were introduced. The X-ray diffraction analysis reveals that Coordination polymer1crystallizes in the monoclinic, space group P43. In1, the metal centers are linked by isophthalic acid ligand to form a two-dimensional (2D) layered structure and simplified into (4.4)-network and the2D layered network further linked with hydrogen bonding to form a3D supramolecular structure. Coordination polymer2exhibits a three-dimensional(3D) structure, reveals that Coordination polymer2crystallizes in the tetragonal, space group P4nc.Chapter three: four kinds of coordination polymers, namely Co(cam)(bbi)0.5·3H20(3), Co3(bbi)(4,4’-sfdb)2(H2O)4(4), Co(aip)(bbi)0.5·H20(5)[Co2(nip)2(bbi)2(H2O)]·5H2O (6) solvothermally synthesized by 4,4’-sulfonyldibenzoic acid, camphoric acid,5-nitroisophthalic acid,5-aminoisophthalic acid and Co(NO3)2-6H2O were introduced. Coordination polymer3exhibits a three-dimensional (3D) structure,3contains two nuclear manganese clusters [Co3(COO)8] through coupling N-donor ligands bbi with the Co(II) ions. Coordination polymer4exhibits a3D column layer structure through coupling4,4’-sulfonyldibenzoic acid ligand and N-donor ligands bbi with the Co(II) ions. Coordination polymer5exhibits a two-dimensional layered network structure. However, the coordination polymer6is a three-dimensional (3D) metal-organic coordination polymer which can be simplified into a (3,4)-connected (834.85) topological network that has never been reported.Chapter fourth:we have summarized the structures and properties of the six coordination polymers, which not only enriches the database of coordination polymers but also indicates that the solvothermal conditions make metal centers and ligands adopt different coordination modes and form interesting architecture.