萘酰亚胺接枝壳聚糖Al3+荧光探针的合成及光谱性能研究

以1，8-萘酰亚胺、壳聚糖、盐酸吗啉胍为原料，通过酰亚胺化、席夫碱等反应，设计合成了一种萘酰亚胺接枝壳聚糖类增强型荧光探针（NCFP）。采用红外、核磁共振等技术对其结构进行表征，利用荧光光谱研究了其光谱性能及对金属离子的识别作用。研究结果表明，合成的荧光探针对Al³⁺具有较高的选择识别性能，且受常见离子的干扰较小。探针的荧光强度与Al³⁺浓度（29.90~253.41 μmol/L）有良好的线性关系，线性相关系数R²=0.997 9，Al³⁺的最低检出限达4.279 μmol/L，Job's曲线表明，荧光探针与Al³⁺的络合比为1：1。

Synthesis and Spectral Properties of Naphthalimide Grafted Chitosan Fluorescent Probe for Aluminum Ion

A fluorescent enhancement probe(for short:NCFP) was designed and synthesized based on the naphthalene imide derivatives grafted chitosan through imidization, schiff base reaction, and so on by using 1,8-naphthalene anhydride, chitosan, moroxydine hydrochloride as raw materials. The structure of the fluorescent probe was characterized by ¹H NMR, FI-IR method, the spectral properties and identification of metal ions were studied with fluorescence spectroscopy. The results indicate that the fluorescent probe has strong fluorescence responses to Al³⁺, and remarkably high selectivity to Al³⁺ than other metal ions. When the concentration of Al³⁺ is in the range of 29.90-253.41 μmol/L, there is a good linearity between the fluorescence intensity of the probe and the concentration of Al³⁺. Linear correlation coefficient R²=0.997 9, the detection limit of the probe is 4.279 μmol/L to Al³⁺. The complexation ratio of probe/Al³⁺ is 1:1 from the method of Job's plot by fluorescence pectrophotometry.