Synthesis,Fluorescence And Magentic Properties Of 4f And 3d-4f Ploynuclear Complexes

Coordination chemistry as an independent discipline,Coordination polymers have been a hot study field of coordination chemistry in the modern world,coordination polymers,due to their various types of heavy metal ions,their diversified structures,unique properties,and unusual photovoltaic effects,used in magnetic materials,nonlinear optical materials,energy storage materials,and superconducting materials.Bioactivity,catalysis and other aspects have good application prospects.Azide ion compounds,halogen-containing compounds can provide abundant bridging ligand mode.The combination of rare earth ions and schiff base organic ligands is expected to synthesize novel compounds that have both advantages and novel structures.Based on the above reasons,we have synthesized three symmetric and unsymmetric schiff base ligands,what's more,through reacting with 3d-4f mixed metals and rare earth metal salt reaction.Thirteen3d-4f and 4f polynuclear metal complexes were synthesized by rare-earth metal self-assembly at the same time and with the help of an auxiliary overseas ligand.Their structure and main properties were studied.The main contents are as follows:?1?3-aldehyde salicylic acid and thiosemicarbazide as raw materials.An asymmetric schiff base organic ligand HL₁?HL₁=3-formyl salicylic acid thiosemicarbazide?was synthesized via condensation reaction.Using the ligand react with transition-rare earth metal salts,we have synthesized six isomorphism3d-4f copper complexes.[Co₂Ln₂]?Ln=Eu?1?,Sm?2?,Gd?3?,Tb?4?,Dy?5?and Ho?6??.The crystal structure of these complexes was examined using X-ray single crystal diffraction,IR,UV,elemental analysis,fluorescence,TG-DTA analysis and magnetic.?2?Through condensing 3-methoxysalicylaldehyde and succinic acid dihydrazide.A new schiff base ligand H₂L₂[?H₂L₂=3-methoxysalicylaldehyde succinic acid dihydrazide?].Using the ligand react with rare earthmetalsalts,wehavesynthesizedtwosimilartetranuclear complexes:[Gd₄?H₂L₂?₄?NO₃?]?NO₃?·2CH₃OH·H₂O?7?,[Ho₄?H₂L₂?₄?NO₃?]?NO₃?·CH₃OH·H₂O?8?,The crystal structure of these complexes was examined using X-ray single crystal diffraction,IR,UV,elemental analysis fluorescence,TG-DTA analysis.?3?Through condensing3-methoxysalicylaldehyde and Salicylaldoxime.A new schiff base ligand H₂L₃[?H₂L₃=3-methoxysalicylaldehyde Salicylaldoxime?].Using the ligand react with transition-rare earth metalsalts,wehavesynthesizedfiveisomorphism3d-4fcomplexes.Cu-Ln?Ln=Dy?9?,Er?10?,Eu?11?,Tb?12?,Ho?13??.The crystal structure of these complexes was examined using X-ray single crystal diffraction,IR,UV,elemental analysis fluorescence,TG-DTA analysis and magnetic.