Synthesis, Structure And Properties Of Metal Complexes Based On N/O Ligands

The chemistry of multifunctional metal–organic hybrid frameworks has been one of the most productive areas of chemical research with rapid development during the past decade. Metal-organic frameworks have been becoming a new field of research as a class of very promising hybrid functional materials with respect to their different geometries, intriguing new structural topologies and potential applications in different fields such as gas adsorption, heterogeneous catalysis, optics, electric conductivity and magnetism. The design and construction of coordination polymers are of great interest due to the ability to tune their properties in a modular fashion. The major contents in the paper were summarized as follows:1 This paper reviews the basic concepts, research background and the development of coordination chemistry, and clarifies the significance and application of their research.2 The V-shaped tetra-carboxylate ligand, 3, 3',4, 4'-oxydiphthalic acid (H4ODPA), in which rigid phenyl ring and flexible ether bond coexist was prepared according to the literature method. Using (H4ODPA) and N-donor ligands, eight metal(II)-ODPA complexes have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 is a three dimensional metal-organic framework (MOF) with an unprecedented {4.64.8}2{42.64} topology generated by the polycatenation of 2D layers. Complex 2 exhibits a uninodal 4-connected 3D framework with 658-CdSO4 topology. Complex 3 shows a uninodal 2D layer with 44-sql topology. Complex 4 is a binodal (4,6)-connected non-interpenetrated 3D architecture with a {3.43.5.6}{32.43.54.64.72} topology. Complexes 5 and 6 are mononuclear and tetranuclear Cu(II) complexes, respectively. Complex 7 shows a 3-nodal (3, 4, 5)-connected non-interpenetrated 3D framework with a {4.6.8}{4.63.8.10}{42.65.83}-LELXEG topology. Complex 8 shows a bimodal 4-connected 3D non-interpenetrated network with a {62.84}{64.82}2 topology. Complexes1, 5, 6 and 8 can sensor SCN-, Cl-, Br- and I- in water, and complexes 2-4 and 7 are not feasible candidates for colorimetrical anion sensing in aqueous solution. A new anion sensing mechanism based on the color change of MOF is proposed. The species of metal(II) in the structure of MOF plays an important role in colorimetrical anion sensing. 3 A novel compound formulated as Cu2(C13H11N6OF2)(N3)3CH3OH (9) was synthesized on the basis of fluconazole, azide and Cu(ClO4)2 and structurally characterized by elemental analysis, IR and single-crystal X-ray diffraction. In the structure of the complex, the deprotonated fluconazole and azide anion link two copper centers to construct a binuclear SBU and the azide anion exhibits aμ1,1-coordination mode. Each triazole group of fluconazole links two SBUs and the compound 9 exhibits a chain-like architecture with strong antiferromagnetism.