Design, Synthesis And Property Studies Of Triazolyl Carbazole Derivatives And Their Complexes

Coordination compounds not only have diverse topologies but also unique optical, magnetic, catalytic and biological properties, so they have attracted more attention.Carbazole derivatives with good optical properties were designed and synthesized by Ullman reaction which connecting heterocyclic triazole molecule which has various coordination modes to carbazole molecule which is flated and delocalized. A series of special structures of supramolecular compounds were obtained by self-assembling of carbazole derivatives and transition metal. Main research results obtained were concluded as follows:1. The recent developments in the research for heterocyclic triazole complexes were reviewed and the idea of designing of this dissertation was put forward based on related literatures.2. Two new compounds,3,6-bis(1,2,4-triazole-1-yl)-ethylcarbazole(L') and 3, 6-bis(1,2,4-triazole-1-yl)-hexylcarbazole (L2) were synthesized. The structures were characterized by 1HNMR, IR, MS, elemental analyses and single X-ray diffraction analysis. Crystal structure analysis showed that the ligands L1 and L2 belong to the triclinic system, the hydrogen bond play the key role in adjacent stacked molecules.3. A series of novel structures of supramolecular compounds were obtained by self-assembling of L1, L2 and transition metal. The crystal structures showed that they possess double-helical, "W" and so on, and their structures were characterized by IR, elemental analyses and single X-ray diffraction analysis. Weak interactions, includingπ-πinteractions, M…X bonds and C-H…X play significant roles in the final crystal structures. Meanwhile, relationship of anion and weak interactions of double-helical was calculated by the density functional theory (DFT).4. A systemic investigation on the properties of the ligands and complexes were carried out, such as UV-Vis, SPEF, Photoluminescence and TGA. The results showed that they have displayed high thermal stability and good optical properties, which are potential optical materials.