Synthesis, Structures And Properties Of Coordination Polymers On N-heterocyclie Ligands And N-containing Carboxylic Acids Ligands

Recently，scientists have paid attention to the research of coordination polymers(MOFs)，because of its outstanding properties such as gas(especially hydrogen and carbon dioxide)absorption，separation and so on.Coordination polymers possess many potential applicationssuch as catalysis，molecular recognition，ion exchange, ultra-high purity separation，biologicalconducting material，photocatalytic material，magnetic materials and chip，which have showedan attractive prospect of application．In this research, we use two types of the most commonly used ligands：N-heterocyclicligands and oxygen-containing ligands. N-heterocyclic ligands include tetrazole-based ligands，pyridine-based ligands and imidazole-based ligands. Oxygen-containing ligands includecarboxylic acid-based ligands and N-containing carboxylic acids ligands. These ligands combinewith transition metals Cd(Ⅱ), Zn(Ⅱ), Mn(Ⅱ), Co(Ⅱ) in solvothermal conditions got12coordination polymers. Let’s look at an overview of the following papers：In the first chapter, one brief introduction about the concept and development of coordinationpolymers, the general synthesis method and the influence factor of coordination polymers, aswell as research significance and tendency.In the second chapter,one brief introduction about the experimental procedure，requiredchemical reagents, the main reaction apparatus and test equipment, and the test conditions.In the third chapter,three tetrazole-based organic ligands sal-TZ[L(1)], CN-phen-TZ[L(2)]and Cl-phen-TZ[L(3)] coordinated with Cd(Ⅱ), Zn (Ⅱ), Mn (Ⅱ) ions got seven coordinationpolymers, namely [Zn(sal-TZ)2](H2O)2(1),[Cd(sal-TZ)2](H2O)3(2),[Mn(sal-TZ)2](H2O)(3),[Cd3(CN-phen-TZ)6](H2O)(4),[Mn3(CN-phen-TZ)6](H2O)2(5),[Cd3(Cl-phen-TZ)6](6),[Zn(Cl-phen-TZ)2(pyr)](7). Complexes1-3are of the same configuration, between each twometal ions link a ligand to form an one-dimensional chain structure.Then through hydrogen-bondinteraction to constitute three-dimensional framework. Complexes4-6are isomorphic type, threemetal ions link through ligands arranged in a line along the c-axis to constitute three-coreclusters. Complexes7uses two ligands: Cl-phen-TZ[L(3)] and pyridine. Metal ions link throughligands to form one-dimensional chain structure.Then through hydrogen-bond interaction to formtwo-dimensional network structure. We analyze the structure of complexes1-7by X-ray diffraction data, verify the structures of complexes1-7by IR, XRD and thermal gravimetricanalysis. Complexes1-7exhibit the fluorescence properties as well as complexes3and5exhibitferromagnetic properties.In the fourth chapter,2,6-benzenedicarboxamide(3,5-acid)pyridine[L(4)] coordinated withCd(Ⅱ), Zn(Ⅱ), Mn(Ⅱ) ions got three polymers, namely [Co5L(4)4(H2O)2](H2O)6(DMA)(8),[CdL(4)4(H2O)6(DMA)](9),[Mn4L(4)(CH3COO)3](H2O)7(10). Complexes8forms(5,4)-connected three-dimensional framework. Complexes9forms (4,4)-connected diatopological three-dimensional framework and non-penetration phenomenon hexagonal holes.Complexes10forms three-dimensional framework and has a square hole.While formic acidextension in the hole make the hole irregular. We analyze the structure of complexes8-10byX-ray diffraction datas, verify the structure of complexes8-10by IR, XRD and thermalgravimetric analysis. Complexes8and10exhibit ferromagnetic properties.In the fifth chapter, Through mixed ligands Mode,2-amino terephthalic acid[atpt L(5)] and1-(4-(1H-imidazol-1-yl)phenyl)-1H-imidazole[1,4-bip L(6)] coordinated with Cd(NO3)·6H2Ogot [Cd(atpt)(1,4-bip)(MeOH)](DMF)(H2O)(11);4-(1H-tetrazol-5-yl)benzenamine[tzp L(7)]and4,4’-bipyridine (4,4’-bpy) coordinated with Cd(NO3)·6H2O got [Cd (tzp)(4,4’-bpy)(CH3COO)(H2O)2](H2O)2(12). In complex11, Cd(Ⅱ) ions link through atpt to form a dimensionalchain structure,1,4-bip link two chains to form two-dimensional structure, finally through1,4-bip link layers form a three-dimensional structure and a non-penetration phenomenonhexagonal holes. In complex12, Cd(Ⅱ) ions connect formic to form a one-dimensional chainstructure, then link with4,4’-bpy to form a planar grid structure, tzp via hydrogen-bondinteraction connected with adjacent two layers to form three-dimensional structures. All fivenitrogen atoms of tzp were used to form hydrogen bonding, making tzp arranged betweenadjacent two layers. We analyze the structures of complexes11-12by X-ray diffraction datas,verify the structure of complexes11-12by IR, XRD and thermal gravimetric analysis.Complexes11and12exhibit fluorescence properties.In the sixth chapter, Summarize the main work of this paper，draw conclusions and proposeinadequate.