1,8-萘酰亚胺金属离子荧光探针的合成与性能研究

Synthesis and Metal Ion Recognition Ability of 1,8-Naphthalimide Fluorescent Probe

以4-溴-1,8-萘酐为起始原料,通过与N-肼基吡啶发生酰化反应制得4-溴-N-氨基吡啶-1,8-萘酰亚胺(2)后,再与乙醇胺缩合得到4-羟乙基胺-N-氨基基吡啶-1,8-萘酰亚胺(3),并以荧光光谱法研究了化合物3对Cd2+、Cr3+、Cu2+、Fe3+、Sm3+、K+、La3+、Mg2+、Ba2+、Zn2+、Ni2+、Ir3+、Al3+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3的荧光光谱均发生了不同程度的猝灭现象,化合物3对Fe3+的识别作用最优,络合常数为3.91×105L/mol,表现出较好的选择性。

4-Bromo-N-pyridine amino-1,8-naphthalimide(2)was obtained via the condensation of 1,8-anhydride naphthalene and aminopyridin followed by reacting with ethanolamine to afford 4-butylimide-N-pyridineamino-1,8-naphthalimide(3).Its metal recognition properties were measured by fluorescence quenching spectroscopy.The results showed that metal ions led to different quenching of fluorescence.Compound 3 showed good selective recognition ability on Fe3+with a dissociation constant of 3.91×105 L/mol.