Syntheses,Characterization,Crystal Structure And Spectroscopic Properties Of New Schiff Base Ligands And Their Transition Metal Complexes

Four new Schiff base ligands based on p-aminoacetophenone was designed and synthesized.And they were respectively reacted with the transition metal acetate to obtain a series of complexes.By single crystal X-ray diffraction,10 single crystal data were obtained,named HL³,[Cu₂?L¹?₄],[Cu?L¹?₂],[Co?L¹?₂],[Ni?L¹?₂],[Zn?L¹?₂],[Co?L²?₂],[Ni?L²?₂],[Cu?L³?₂]and[Cu₂?L⁴?₄].They were characterized using IR and UV-vis spectra.In addition,their supramolecular architectures were investigated by the single crystal data.In the section of properties,Schiff base ligands have conjugated?bonds on their structure,and their fluorescence characteristics have been studied.The experimental results show that ligands have certain fluorescence properties.For Zn???complexes,there is a fluorescence enhancement effect,while Cu???complexes have a fluorescence quenching effect.Complex 1?[Cu₂?L¹?₄]?:Empirical formula,C₆₄H₆₀Cu₂N₈O₈,Formula weight,1196.28,monoclinic,P2₁/c,a=15.6740?8????,b=12.1113?7????,c=14.8149?8????,?=90.00°,?=98.838?2?°,?=90.00°,Z=2,V=2779.0?3????³,R₁=0.0428,wR₂=0.0953;Complex 2?[Cu?L¹?₂]?:Empirical formula,C₃₂H₃₀CuN₄O₄,Formula weight,598.14,monoclinic,P2₁/n,a=10.590?3????,b=6.2406?9????,c=20.765?3????,?=90.00°,?=96.679?8?°,?=90.00°,Z=2,V=1363.0?5????³,R₁=0.0607,wR₂=0.1275;Complex 3?[Co?L¹?₂]?:Empirical formula,C₃₂H₃₀CoN₄O₄,Formula weight,593.53,triclinic,P-1,a=8.7040?5????,b=12.7375?9????,c=14.2626?9????,?=99.054?2?°,?=95.727?2?°,?=92.477?3?°,Z=2,V=1550.96?17????³,R₁=0.0486,wR₂=0.1128;Complex 4?[Ni?L¹?₂]?:Empirical formula,C₃₂H₃₀N₄NiO₄,Formula weight,593.31,monoclinic,P2₁/n,a=10.646?6????,b=6.183?4????,c=20.536?12????,?=90.00°,?=96.008°,?=90.00°,Z=2,V=1344.3?13????³,R₁=0.0996,wR₂=0.2443;Complex 5?[Zn?L¹?₂]?:Empirical formula,C₃₂H₃₀N₄O₄Zn,Formula weight,599.97,triclinic,P-1,a=8.6632?8????,b=12.7133?10????,c=14.2719?12????,?=98.585?3?°,?=94.985?3?°,?=92.916?3?°,Z=2,V=1545.1?2????³,R₁=0.0714,wR₂=0.1487;Complex 6?[Co?L²?₂]?:Empirical formula,C₄₀H₃₆CoN₄O₄,Formula weight,695.66,monoclinic,C2/c,a=27.320?13????,b=5.929?3????,c=20.549?10????,?=90.00°,?=94.269?9?°,?=90.00°,Z=4,V=3319?3????³,R₁=0.0521,wR₂=0.1453;Complex 7?[Ni?L²?₂]?:Empirical formula,C₄₀H₃₄N₄NiO₄,Formula weight,693.42,monoclinic,P2₁/c,a=21.443?7????,b=13.862?5????,c=11.733?4????,?=90.00°,?=103.690?5?°,?=90.00°,Z=4,V=3388?2????³,R₁=0.0484,wR₂=0.1228;Crystal 8?HL³?:Empirical formula,C₁₈H₂₀N₂O₂,Formula weight,296.36,monoclinic,Pc,a=17.8843?15????,b=7.1821?6????,c=6.3086?6????,?=90.00°,?=98.487?3?°,?=90.00°,Z=2,V=801.45?12????³,R₁=0.0463,wR₂=0.1261;Complex 9?[Cu?L³?₂]?:Empirical formula,C₃₆H₃₈CuN₄O₄,Formula weight,654.24,triclinic,P-1,a=8.492?2????,b=9.574?2????,c=10.512?2????,?=100.170?7?°,?=103.421?7?°,?=95.055?8?°,Z=1,V=810.8?3????³,R₁=0.0418,wR₂=0.1136;Complex 10?[Cu₂?L⁴?₄]?:Empirical formula,C₆₈H₆₈Cu₂N₈O₈,Formula weight,1252.38,monoclinic,P2₁/c,a=16.241?3????,b=12.1604?19????,c=15.531?3????,?=90.00°,?=96.364?3?°,?=90.00°,Z=2,V=3048.3?9????³,R₁=0.0497,wR₂=0.1065;...