Studies On Preparations And Properties Of Coordination Complexes Based On New Nitrogen And Oxygen Mulitdentate

The design and syntheses of functional coordination architectures with novel topologiesand structural motifs as well as special functions and properties is of current interest in manyfields. Over the past decades, various kinds of coordination architectures have been reported,and some of them were found to have potential applications, in optics, catalysis andseparation, magnetism, and molecular recognition and so on. However, the rational designand synthesis of multi-nuclear discrete coordination architectures and polymeric coordinationnetworks with metal ions （or metal clusters） as nodes and organic ligands as building blocksis still at an evolutionary stage with the current focus mainly on understanding the factors todetermine the crystal packing.Considering all the aspects mentioned above, in this dissertation, several carboxylicligands with differently novel ring skeletons were selected to react with some transition metalions, and related metal complexes have been obtained and characterized by elementalanalyses, IR, and X-ray crystallography. Moreover, the correspondingluminescent/magnetic/thermal properties of the complexes have also been investigated indetail. Also, the factors governing the framework formations of these complexes werediscussed. The main contents consisting of four chapters have been summarized as following:In chapter1, a brief introduction of the backgrounds and relative concepts of this workwere presented. The progress of the coordination chemistry of the related ligands wasconcisely reviewed, and the research significance and main conclusions of this dissertationwere summarized.In chapter2, we synthesized and characterized two groups rare earth isomorphic3Dcomplexes with Citrazinic acid （HL） and sometimes incorporating different auxiliary ligands.In chapter3, three series of five Cu^Ⅱ, five Cd^Ⅱ, and three Zn^Ⅱcoordination complexeswere synthesized by using naphthalene-2,3-dicarboxylic acid （H₂L¹） andnaphthalene-1,2-dicarboxylic acid （H₂L²） and different N-donor auxiliary bridging co-ligandssuch as4,4′-bipyridine,1,3-bis（4-pyridyl） propane,1,2-Bis（4-pyridyl）ethane andtrans-1,2-Bis（4-pyridyl）ethylene and structurally characterized by elemental analyses, IR, and X-ray diffraction analysis. Also, the luminescent properties of the corresponding d10complexes mentioned above have been further investigated.In chapter4, along that line of research in chapters2and3, we, by employing thecyclobutanedicarboxylicacid as a primary ligand, also synthesized and characterized Co^Ⅱ,Mn^Ⅱ, Zn^Ⅱ, Cd^Ⅱand Gd^ⅡIcomplexes, and sometimes together with different auxiliary ligands.The related luminescent/thermal properties of such complexes have been further investigatedand discussed in detail.