Solvothermal/Hydrothermal Synthesis, Crystal Structure And Properties Of3d Transition Metal Functional Coordination Compounds

The design and synthesis of3d transition metal functional coordination compounds become a hot spot in the field of coordination chemistry. Via in situ solvothermal/hydrothermal reactions, the ligand will be changed into another state in this process, therefore coordinated with metal ions easily. So, this method has also been applied to promoting the production of novel coordination crystalline materials. In this thesis, with another second ligand or structure directing agent,9new complexes have been synthesized by the solvothermal synthesis of4-Amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (abpt) and3d transition metal salts. Also, one1D-chain compound with carboxylic acid ligand was obtained by the hydrothermal reactions. The crystal structures of these complexes were characterized, and the magnetic and luminescence property for some of them were tested. The main research of this thesis includes the following several respects.1One mononuclear Co(Ⅱ) complex with abpt or carboxylic acid ligand was obtained by the solvothermal and hydrothermal synthesis respectively.2A series of mononuclear, tetranuclear, pentanuclear, hexanuclear and1D chain complexes derived from abpt with the ligand changed into 3,5-bis(pyridin-2-yl)-1,2,4-triazolate (bpt) during the solvothermal reactions. The mononuclear Cu(Ⅱ) asymmetric units were connected into a1D chain structure with strong hydrogen bonds. With the π-π interactions between the pyridine rings from bpt, they got a tetranuclear Cu(Ⅱ) and a hexanuclear Cu(Ⅰ/Ⅱ) complex to self-assemble into3D and1D chain supramolecular respectively. Magnetic measurements revealed that dominant anti-ferromagnetic interactions existed between the five Co nuclears in the pentanuclear Co(Ⅱ) compound. The relationship with the crystal structure and the spatial configuration of ligands was discussed.3There are two other unstable intermediate states from abpt exist in the solvothermal condition, giving a1D chain Zn and a novel mononuclear Ni(Ⅱ) complex, which have not been reported. This new1D chain fluorescent zinc complex solution can sense different concentration ions, and the Ni complex has a whole new structure which will undertake further researches.