4-苄胺-N-氨基吡啶-1,8-萘酰亚胺的合成及其金属离子识别作用研究

Synthesis and Metal Ion Recognition Abilities of 4-benzylamine-N-aminopyridine-1,8-naphthalimide

以4-溴-1,8-萘酐为起始原料,与2-肼基吡啶反应得到4-溴-N-氨基吡啶-1,8-萘酰亚胺(BNB)后,再与正苄胺缩合制得4-苄胺-N-氨基吡啶-1,8-萘酰亚胺(BNBB),并以荧光光谱法研究了化合物BNBB对Cu^(2+)、Cd^(2+)、Fe^(3+)、Cr^(3+)、Zn^(2+)、Ir^(3+)、Mg^(2+)、La^(3+)、Sm^(3+)、Ba^(2+)、Ni^(2+)、K^+、Al^(3+)等13种金属离子的识别作用。结果表明,随着各种金属离子的加入,化合物BNBB的荧光光谱均发生了不同程度的变化;化合物BNBB对Fe^(3+)的识别作用最优,络合常数为2.36×10^5 L·mol^(-1),展示出良好的选择性。

4-bromo-N-aminopyridine-1,8-naphthalimide(BNB)was synthesized by the reaction of 4-bromo-1,8-naphthalic anhydride and 2-hydrazinopyridine,and then reacted with benzylamine to offer 4-benzylimide-N-aminopyridine-1,8-naphthalimide(BNBB).Its recognition properties on various metal were determined by fluorescence quenching spectroscopy.The results indicated that addition of the various metal ions caused to different quenching of fluorescence spectroscopy.Compound BNBB exhibited good selective recognition ability on Fe^(3+),with the dissociation constant 2.36×10^(5) L·mol^(-1).