Syntheses And Properties Of Pyridyl-1,2,3-Triazole Based Coordination Compounds

Functional coordination compounds have extensive application prospect and research value in catalyst,organic semiconductor,bioimaging,biosensor,molecular magnet,ferroelectric and dielectric material.In the design and synthesis of coordination compounds,both the metal ion and the organic ligand are important factors that influence the properties of coordination compounds;the structure of the ligand may affect the construction of coordination bond,charge transfer and supramolecular interaction.1,2,3-triazole is a significant nitrogen heterocyclic ring.With good biological compatibility and stability,it has been widely applied in pharmaceutical,material and organic synthesis chemistry.So far 1,5-substituted-1,2,3-triazole(in which N1 is occupied)has been widely studied.However,due to the synthetic method,the study based on 4-(2-pyridyl)-1H-1,2,3-triazole ligand is quite rare.This ligand contains two aromatic π sextet.It features both pyridine basic and NH-acidic.Thanks to the un-substitute 1,2,3-triazole,the three nitrogen atoms are all potential coordination sites,thus giving novel coordination compounds;The electron density of these nitrogen atoms is different,which is beneficial for studying the coordination diversity,supramolecular interactions and its impact on metal complexes.These features lay good foundation for the design and synthesis of functional material with potential application.The main research contents and conclusions of this thesis are as follow:The first chapter was a review on 2-pyridyl-1,2,3-triazole-based coordination compounds.The structure and features of 1,2,3-triazole and 2-pyridyl-1,2,3-triazole were introduced in the first place.Then the application of this ligand in coordination chemistry,photochemistry,organometallic chemistry,molecule magnet and antibacterial material was presented.Finally,the features of the ligand were summarized and the research idea and content were proposed.The second chapter introduces a one-dimensional Mn(II)complexe which was chelated and bridged by 4-(2-pyridyl)-1,2,3-triazole.The structure,magnetism and magneto-correlation were studied.In the third chapter,three copper complexes with different counter anions were obtained.Their structures,optical and electrochemical properties were compared n detail.We also studied how the supramolucular interactions and electron-withdrawing ability of the terminal ligand affect the bandgap of coordination compounds.The fourth chapter introduced two pairs of genuine supramolecular isomers based on 4-(2-pyridyl)-1H-1,2,3-triazole.We studied the influence of reaction time,temperature and solvent on the crystal growth process of Co(II)complexes.The properties of the isomers in liquid,solid and gas phase were investigated and compared;the influence of different transition metal ions was also studied.