Highly Selective Detection of Cr(VI) in Water Matrix by a Simple 1,8-Naphthalimide-Based Turn-On Fluorescent Sensor
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- 作者：Zhiyuan Zhang ; Chunming Sha ; Aifeng Liu ; Zhenyu Zhang…
- 关键词：1 ; 8 ; Naphthalimide ; Fluorescent ; Probe ; Sensor ; Cr(VI)
- 刊名：Journal of Fluorescence
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：25
- 期：2
- 页码：335-340
- 全文大小：490 KB
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- 刊物主题：Biomedicine
Biomedicine
Biophysics and Biomedical Physics
Biotechnology
Biochemistry
Analytical Chemistry - 出版者：Springer Netherlands
- ISSN：1573-4994
文摘
4-Bis-(2-hydroxyethyl)amino-N-n-butyl-1,8-naphthalimide was developed into a turn-on fluorescent sensor for Cr(VI). In the mixture of N,N-dimethylformamide and deionized water (1:9, v/v), the sensor could highly selectively distinguish CrO4 2?/sup> from Cr3+, Na+, K+, Mg2+, Ca2+, Mn2+, Fe2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Pb2+, NO3?/sup>, SO4 2?/sup>, PO4 3?/sup>, IO3 ?/sup>, ClO?/sup> and Cl?/sup> by a 6-fold fluorescence enhancement. The working concentration of CrO4 2?/sup> was from 0 to 90?μM with a detection limit of 3.6?×-0??mol/L. The detection could be carried out in water matrix and within a wide pH range (approximately from 2 to 12), and a large number of environmentally and biologically relevant ions including Cr3+ showed no significant interferences with the detection. The sensing mechanism was explored by reversibility and LC/MS analysis, as well as Job’s plot experiment, and the results suggested that the recognition was based on the oxidation of the primary alcohol in the structure of the sensor by the Cr(VI) sources.