5-甲氧基水杨醛缩3-羟基-2-萘甲酰肼席夫碱的合成及其荧光性质研究

Synthesis and Fluorescence Properties of 5-methoxysalicylaldehyde 3-hydroxy-2-naphthylhydrazine Schiff Base

通过加成-消除反应合成了5-甲氧基水杨醛缩3-羟基-2-萘甲酰肼席夫碱,通过IR、^(1)H NMR和元素分析对其结构进行了表征.并对其与不同金属离子如Ag^(+)、Ni^(2+)、Pb^(2+)、Cu^(2+)、La^(3+)、Ce^(3+)、Cd^(2+)、Zn^(2+)、Sr^(2+)等作用前后的荧光性质进行了研究.实验结果表明,不同的金属离子能使该席夫碱荧光强度发生不同程度的改变.Ag^(+)使席夫碱的荧光强度略有增强,其他金属离子则使席夫碱的荧光强度发生不同程度的减弱,Pb^(2+)与席夫碱作用后荧光强度降低最大,甚至发生荧光猝灭现象.

5-methoxysalicylaldehyde 3-hydroxy-2-naphthylhydrazine Schiff base was synthesized by addition and elimination reaction.Its structure was characterized by IR、^(1)H NMR and an elemental analyzer.The fluorescence property was studied before and after interacting with different metal ions such as Ag^(+),Ni^(2+),Pb^(2+),Cu^(2+),La^(3+),Ce^(3+),Cd^(2+),Zn^(2+),Sr^(2+),etc.The test result showed that the fluorescence intensity of the Schiff base could be changed by different metal ions.Silver ion enhanced the fluorescence intensity of Schiff base,while other metal ions weakened it to varying degrees.The fluorescence quenching phenomenon occurred after the lead ion acted with the Schiff base.