Syntheses,Structures And Properties Of Coordination Complexes Based On Azotriazolyl Derivative Ligands

The functional coordination complexes based on azotriazolyl derivative ligands,which have various novel structures and the advantages of both organic ligands and inorganic metal ions,display broad application prospects in the field of material,energy and environment.In this paper,the lanthanide metal coordination complexes based on 5-azotriazolyl salicylic acid and 1-azotriazolyl-2-hydroxy-3-naphthoic acid were synthesized.The magnetic and optical properties were investigated.In chapter 1,the research progress of the coordination complexes based on triazoles derivatives,azo derivatives and lanthanide metal were mainly introduced,respectively.In chapter 2,five lanthanide coordination complexes based on 5-azotriazolyl salicylic acid?H₃AS?ligand,{[Ln?HAS??OAc??H₂O?₂]·4H₂O,Ln=Dy?1?,Tb?2?,Ho?3?,Er?4?,Yb?5?}have been synthesized and characterized.X-ray crystallography shows that 1-5 are all the two-dimensional grid structure.The two-dimensional coordinated layers are further linked to a stable three-dimensional supramolecular network by three kinds of?-?stacking interactions.The aqueous solution of 1 and 2shows the photoisomeric properties.2 exhibits a strong characteristic green fluorescence of Tb?III?in solid state induced by the efficient antenna effect of the H₃AS ligand.1 shows single-molecule magnets?SMMs?behavior.In chapter 3,four lanthanide coordination complexes based on 1-azotriazolyl-2-hydroxy-3-naphthoic acid?H₄AH?and 2-hydroxy-3-naphthoic acid?H₂NA?ligand,{[Ln₂?H₂AH?₂?HNA?₂?H₂O?₄]·DMF,Ln=Dy?6?,Tb?7?,Sm?8?,Eu?9?}have been synthesized and characterized.X-ray crystallography shows that 6-9 are all the dinuclear structure.Each unit cell is further linked to a stable three-dimensional supramolecular network by hydrogen bond interaction.6 shows single-molecule magnets behavior.7 shows the fluorescence enhancement in DMF solution with the increased time of 365 nm UV light irradiation.9 exhibits a strong characteristic red fluorescence of Eu?III?induced by the efficient antenna effect of the ligands.