Coordination Chemistry And Electrochemistry Based On Carbazole-bridged Imidazol Ligands

Metal-Organic Frameworks?MOFs?are also known as supramolecular coordination polymer which is made of metal and organic linkers through coordination.In this paper,five organic ligands based on carbazole-bridged imidazol ligands were synthesized.In addition,the coordination chemistry based on these ligands with transition metal ions was investigated and totally 8 new coordination compounds have been designed and synthesized.They were characterized by X-ray single-crystal diffraction,IR and TGA.Furthermore,the structure regulation properties and electrochemistry properties of several compounds were investigated.?.Three Cd???coordination polymers based on a bent 2,7-di?1H-imidazol-1-yl?-9-R-carbazole Ligand?R = methyl,ethyl and n-propyl??L1,L2 and L3?,have been prepared and characterized by elemental analysis,IR,PXRD,thermogravimetry and single-crystal X-ray diffraction analysis.Also,structure regulation based on substituent group was investigated.?.Four new Ni???metal-organic frameworks were synthesized through reaction L2,L3,L4 and L5 with Ni?OAc?₂·4H₂O in solution,respectively.The four compounds are isostructural and have good electrical catalytic properties.The four compounds with GC electrode could form composite electrodes,respectively.Their electrochemistry catalytic properties showed regular change.Compound 4 showed better catalytic properties in neutral buffer and its electrochemistry catalytic properties were investigated under different p H buffer.Moreover,the composite electrodes with compound 4 could proceed in electrochemistry catalysis about 18 h.?.A bent ligand,2,7-di?1H-imidazol-1-yl?-9-ethyl-carbazole?L2?,was synthesized and used to generate a novel co-crystallized hybrid complex?8?with MnII in the presence of terephthalic acid?H2TPA?,namely bis[2,7-di?1H-imidazol-1-yl?-9-ethyl-carbazole-?1N]-tetra?aqua?manganese?II?diterephthalic dihydrate,[Mn(C₂₀H₁₇N₅)₂?H₂O?₄]·2?C₈H₅O₄?·2?H₂O?.Compound 8 features a mononuclear molecule with one six-coordinated Mn^? centre,which is made of two terminal imidazole ligands and four coordinated water molecules.In order to form stable a three-dimensional super molecular architecture,weak interactions are indispensable.Compound 8 was bridged into a three-dimensional super molecular architecture via three kinds of ?-? interactions and seven kinds of hydrogen bonds.Two water molecules in the lattice act as important connection bodies through hydrogen bonds.A thermogravimetric analysis of complex?8?was also carried out.