萘酰亚胺衍生物的合成及对铁离子(Ⅲ)的识别

Synthesis of Naphthalimide Derivatives and Its Recognition of Fe^(3+)

以4-溴-1,8-萘酐为原料合成了新型萘酰亚胺衍生物N-正己基-4-苄胺基-1,8-萘酰亚胺(HBN),通过NMR和MS表征了其结构。利用荧光光谱研究它对铁离子(Ⅲ)的识别作用。实验显示,在C2H5OH/H2O(φ:1/1)体系中,当Fe3+浓度为4×10-7~1×10-2 mol·L-1时,HBN荧光强度随Fe3+浓度增加大幅度下降。线性回归方程为:F0/F=623.253 2cFe3++0.964 2(R2=0.996 3)。常见金属离子,如Ca2+,Na+,Cu2+,Zn2+,Pb2+,Co2+,Ni 2+,Mn2+及Fe2+等,均不干扰HBN对Fe3+的识别。结果表明,HBN对Fe3+具有较好的选择性和灵敏度。

A novel naphthalimide derivatives N-hexyl-4-benzylamino-naphthalimide（HBN） was synthesized from 4-bromo-1,8- naphthalic anhydride, and the structure was characterized by NMR and MS. Spectral properties of HBN for recognition of Fea＋ were investigated by fluorescence spectrum. In a certain range of Fe3＋ from 4×10 7 to 1×10-2 mol · L-1 , the fluorescence in- tensity of HBN significantly reduced with increasing concentration of Fe3＋ in ethanol/water（1 ： 1, volume ratio）. The equation of linear regression was Fo/F=623. 253 2cFe3＋ ＋0. 964 2 （R2 =0. 996 3）. Moreover, no obvious interference with the detection of the Fe3＋ ion was observed in the presence of the common metal ions such as Ca2＋ , Na＋ , Cu2＋ , Zn2＋ , Pb2＋ , Co2＋ , Ni2＋ , Mn2＋ and Fe2＋ , which indicated that HBN displayed excellent selectivity and high sensitivity for the detection of Fe3＋.