Synthesis And Characterization Of Metal Complexes Supported By S/N Ligands And Their Optical And Electrical Properties

Particular attention has been devoted to metal complexes supported by S / N ligands because of their rich coordination chemistry, their relations to catalytic activities, electricity, biochemical systems, and photophysical properties. This thesis reported some novel metal complexes supported by S / N ligands by using self-assembling. These complexes were characterized by X-ray diffraction. On this basis, the thermal stability of these complexes and some of the complex fluorescence were further studied. The main results are as follows:1. Utilizing 4,4'-dipyridyl sulfide (dps) as flexible multidentate ligand, sodium dicyanamide(dca) as the second ligand, two novel coordination polymers with Cd(II) , Fe(II) metal ions were prepared: [Cd(dca)₂(dps)]_∞(1, 3D framework), [Fe(dca)₂(dps)]_∞(2, 3D framework) by hydrothermal reactions. All these complexes were characterized by elemental analysis and IR spectroscopy and X-ray diffraction and thermal stability (TGA). Fluorescence spectroscopy by [Cd(dca)₂(dps)]_∞(1D) was measured. From the fluorescence emission spectrum of the complex: the complex has a wide absorption peaks in 550 nm wavelength.2. M(DTAC)_n (M=Cd, Pb, Bi) were prepared by the reaction of 9-carbazole-9-carbodithioic acid (DTAC) with Bi(NO)₃, Pb(NO)₂ and Cd(NO3)₂, and these complexes were characterized by UV and IR spectroscopy and X-ray diffraction and ¹HNMR. The results are: the structure of Pb(DTAC)₂ is one-dimensional chain, Bi(DTAC)₃ is a binuclear compound, the ligand (DTAC) has the same coordination modes with the central metal ions. In these complexes, the coordination bonds between the sulfur atoms bidentate ligand and central metal ions. Utilizing them as nanoparticle of metals sulfide multidentate by the single source, the controllable shape and disperse nanoparticle of metals sulfide multidentate were prepared.3. A novel functional ligand :dual-N-amino-pyridine aldehyde-4-hydrazine -1,8 naphthalimide (DPNA) was synthesized, the fluorescence emission spectrum wavelength of the ligand was 480 nm. Different metal ions effect its fluorescence properties differently. Electric memory performance of this ligand was measured, too.