Synthesis And Photoelectric Property Of Aryloxycarboxylic Acid Coordination Supramolecule

The aromatic carboxylate-based complexes exist intriguing structures and photoelectric properties, which have become one of the advancing fields of current chemical and material science. In this thesis, the aryloxycarboxylic acids were used as the ligand, reacting with transition metal ions under hydrothermal or solvothermal conditions, obtaining seven no-reported supramolecule coordination compounds. Furthermore, their syntheses, structure and photoelectric properties were studied.The studied works are concluded in the following:1. 8-Quinolyloxy acetic acid has been synthesized and their new Co~II and Pb~II complexes (1-3) have been prepared. The structures of ligands and complexes were characterized by IR and elemental analysis.2. 5-Chlorine-8-quinolyloxy acetic acid has been synthesized and their new CdII, CoII, Ni~II and Zn~II complexes (4-7) have been prepared. The structures of ligand and complexes were characterized by IR,1~H-NMR and elemental analysis.3. The crystal structures of seven complexes were characterized by single crystal X-ray diffraction techniques. Complexs 1, 2 and 7 are one-dimensional chain coordination polymers. Complex 3 is two-dimensional net coordination polymer. Complexes 4-6 are trinuclear, tetranuclear and dinuclear structures, respectively. In these complexes, the carboxylate exist different coordination models.4. The photochemical properties of complexes are determined. Complexes 2, 3, 4 and 7 show good luminescent properties.5. The semiconductor property of the complexes are determined by UV-VIS diffuse reflectance. Energy gaps of complexes 1-7 are 3.2eV, 3.4eV, 2.8eV, 3.1eV, 3.2eV, 2.5eV and 3.1eV, respectively. Optical diffuse-reflection spectra results suggest that all the complexes have the properties of the semiconductor.