发光学报, 2018, 39 (4): 573, 网络出版: 2018-05-07
萘酰亚胺接枝壳聚糖Al3+荧光探针的合成及光谱性能研究
Synthesis and Spectral Properties of Naphthalimide Grafted Chitosan Fluorescent Probe for Aluminum Ion
摘要
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,Jobs曲线表明,荧光探针与Al3+的络合比为1∶1。
Abstract
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 uorescence 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 Jobs plot by fluorescence pectrophotometry.
刘静, 谈光华, 张帆, 马静, 王静静. 萘酰亚胺接枝壳聚糖Al3+荧光探针的合成及光谱性能研究[J]. 发光学报, 2018, 39(4): 573. LIU Jing, TAN Guang-hua, ZHANG Fan, MA Jing, WANG Jing-jing. Synthesis and Spectral Properties of Naphthalimide Grafted Chitosan Fluorescent Probe for Aluminum Ion[J]. Chinese Journal of Luminescence, 2018, 39(4): 573.