Controllable Structure And Properties Of Coordination Polymers Based On Aromatic Carboxylic Acid

In this paper, we successfully synthesized series of coordination polymers with novel structure combination of aromatic carboxylic acid ligands and metal ions and summarized synthesis conditions and rules of the coordination polymers, such as the factors of electronic and steric effect, the characteristic of the solvent, the pH, the reaction temperature and the material ratio of ligand to the polymer structure. We have explored the molecular self-assembly principle and the relationship between material structure and performance.Hydro(solvo)thermal synthesis and diffusion in room temperature have been proven to be an effective method in preparing functional coordination polymers in this paper, we regulated and charactered the coordination polymers by elemental analysis, IR, XRPD, TG and X-ray single crystal diffraction in order to study the thermal stability, fluorescence properties and magnetic coordination polymers.1. We used 2-(4-chlorobenzoyl)benzoic acid and got three rare earth coordination polymers with a double helix in one dimensional chain by the hydrothermal, which were divided as follows: [La(cbba)3H2O]n (1) [Pr(cbba)3H2O]n (2) [Nd(cbba)3H2O]n (3)1-3 are isomorphous and isostructural and assembled into 3D networks through C-H…π and C-H·Cl interactions between the parallel ID chains. The coordination polymer 3 has a good recognition on the Ag+.2. We used benzene-1,4-dioxydiacetic acid (Chloroacetic acid and 1,4-Benzenediol) and got four rare earth coordination polymers with the water molecules by the hydro(solvo)thermal, which were divided as follows: {[Pr(BDOA)1.5(H2O)]-H2O}n (4) {[Eu(BDOA)1.5(H2O)]H2O}n (5) {[Gd(BDOA)1.5(H2O)]H2O}n (6) {[Tb(BDOA)1.5(H2O)]-H2O}n (7)4-7 are isomorphous,4-6 are isostructural, the inclusion of water molecules connected the organic metal framework by hydrogen bonds. We have researched the thermal stability, fluorescence properties and magnetic of coordination polymers 5 and 7.3. We used 1,1,1"-(2,4,6-trimethylbenzene-1,3,5-triyl(methylene))-tri-(4-carboxypridin-l-ium) and got four rare earth coordination polymers with the larger cavity by the diffusion in room temperature, which were divided as follows: [Pr(MMC)-2H2O]n (8) [Sm(MMC)-2H2O]n (9) [Gd(MMC)-2H2O]n (10) [Yb(MMC)-2H2O]n (11)8-11 are isomorphous and isostructural. We have researched the magnetic of coordination polymer 8 and the fluorescence properties of coordination polymers 10-11. The results prove that the coordination polymer 11 has a good recognition on the Pb2+.4. We used 4,5-di(3’-carboxylphenyl)-phthalic acid,1,10-phenanthroline and dimidazole and got five transition metal coordination polymers with different dimensions by the hydrothermal, which were divided as follows: [Co(H2ttac)(phen)2]-4H20 (12) [Zn(H3ttac)(phen)2]-4H2O (13) [Cu(H3ttac)(phen)]n (14) [Zn2(ttac)(DMZ)H2O]n (15) [Cd(ttac)(phen) H20]n (16)12 and 13 are zero-dimension coordination polymers,14 is one-dimension coordination polymer,15 is two-dimension coordination polymer,16 is three-dimension coordination polymer. We have researched the the fluorescence properties of coordination polymer 14 which proves that the coordination polymer 14 has a good recognition on the arginine.5. We used Cd(II) as the centre metal ion and got four coordination polymers with the different ligands and experimental conditions, which were divided as follows: [Cd(BDOA)(bpy)(H2O)2]n (17) {[Cd(pdpy)(PTA)]-H2O}n (18) {[Cd(pdpy)(H2O)2]SUL(H2O)0.5}n (19) {[Cd(pdpy)(cbba)2] (cbba)·2H2O}n (20)In this chapter, bpy=4,4’-dipyridyl; PTA=p-phthalic acid; SUL=5-sulphosalicylic acid; pdpy=piperazine-1,4-diylbis(pyridine-4-ylmethanone). We charactered the coordination polymers by elemental analysis, IR, XRPD, and X-ray single crystal diffraction and researched fluorescence properties of coordination polymers.