Design, Synthesis And Optical Properties Of Metal Complex Materials With Functional Divinylpyridine Ligand

Nowadays, optical materials, including inorganic light-emitting materials, organic light-emitting materials and metal complex materials have attracted a great attention due to their potential applications. At present work, we designed and synthesized a novel organic ligand with excellent optical properties. Also, we obtained its metal complexes and a series of polymer nano-particles with dicarboxylic acid by self-assembly. Main research results were concluded as follow.1.The recent development in the research for metal complex optical materials in worldwide were reviewed in the dissertation, based on a great deal of related literatures. New concepts and design of our new metal complexes and nano-particles in the dissertation are presented.2.A novel dipyridine ligand 4-[2,5-dibutoxy-4-((E)-2-(pyridin-4-yl)vinyl)styryl] pyridine (L) was synthesized, which were characterized by NMR, MS, EA and IR spectra. We also obtained two polymorphic single-crystals L-S1 and L-S2. L-S1 crystallizes in the tetragonal form with space groupⅠ41/a, and L-S2 crystallizes in triclinic form with space group Pi. Another single-crystal Zn2(phen)eL(C104)4 was obtained throughπ-πstacking between L and phen. However, different interactions and configures of the same chromophore molecules are observed in the three crystals, resulting in different optical features.3.Nano-crystalline of L was prepared. The morphology, growth process, optical properties and the relationship between optical properties and structures were investigated. The UV spectra prove that the particles are J-aggregates. A series of particles with one-dimensional structure were prepared by the reaction of L with dicarboxylate acids. The morphology, optical properties and formation mechanism of the polymer particles were studied. The emission spectra show that using different dicarboxylate acids can obtain different aggregates. From all the results obtained, it is found that nano-polymers formed by L and oxalic acid maybe stack through hydrogen bonds, with outπ-πinteractions. 4.L was employed as ligand to construct d10 transition metal ions, of which crystal structures and photophysical properties in solid state were investigated. The results show that the absorption and emission properties are different from the ligand. The results show that their optical properties depend on their structures. Two types morphologies nanoscaled coordination particles were prepared. The reason has been given through metal ions radius and intermolecular interactions.