Synthesis,Structures,Properties Of New Coordination Polymers And The Orical Study Of Semi-coordinate Metal Complexes

Coordination polymers, have attracted much attention for various topologies and promising applications in ion-exchange, adsorption, molecular reorganization, catalysts along with optics, electrics, magnetism and enantioselective separation. They are considered as the very potential function material and have become the research hotspots of inorganic chemistry and materials chemistry.The main contents of this thesis are as follows:1) Five new macrocyclic metalloligands, NiL1, NiL2, FeL1, FeL2and FeL3were synthesized. This type of metalloligands have the following characteristics according to the literatures. In forming coordination polymers, metal ions can also chelate the oxygen atoms of amide groups. The oxamido groups mediate magnetic coupling between paramagnetic metal centres. The carboxyl group of the ligands can chelate metal center so that the different dimension of coordination polymer were formed. The above characteristics will endow coordination polymers with a variety of function.2)1D zigzag,1D double zigzag and2D layered coordination polymers with macrocyclic metalloligands were prepared for the first time. The coordination polymers were characterized by means of X-ray powder diffraction, thermogravimetric analysis, UV spectrum and etc. Molecular hydrogen bonding and π-π accumulation interactions exist in these coordination polymers. These weak interactions link the chains or layers to form3D supramolecular structures in the crystals.3) Six isomorphism eight-semi-coordination metal compounds were structurally analysised and compared with compounds having O8coordination environments reported in literature. HR-MS and ICP-OES analyses support the structures of the six compounds. The bond dissociation energies of the weak M-O bonds in the six compounds were calculated via DFT theory at B3LYP level.