一种新型比色荧光双通道水相检测氰根离子的化学传感器

doi:10.11944/j.issn.1000-0518.2016.01.150214

摘要/Abstract

摘要：

合成了一种新型的,能在含水介质中比色荧光双通道单一选择性识别CN^-的传感器分子1-羟基萘甲叉酰肼乙基-3-羟基萘甲叉酰肼甲基苯并咪唑溴鎓盐(J1)。在J1的DMSO/H₂O (体积比3:2)HEPES 的缓冲体系(pH=7.2)中分别加入F^-、Cl^-、Br^-、I^-、AcO^-、HSO₄^-、ClO₄^-、H₂PO₄^-、SCN^-和CN^-等阴离子后,只有CN^-的加入会使得溶液颜色发生明显的变化,由无色变为深黄色。相应地在J1的DMSO/H₂O (体积比4:1)HEPES的缓冲体系(pH=7.2)中加入CN^-,溶液发出明亮的黄色荧光。这一识别过程,不会受到其它阴离子的干扰。紫外-可见光谱的最低检测限为1.57×10^-7 mol/L,检测线性范围为3.875×10^-4~2.15×10^-2 mol/L。荧光光谱的最低检测限为4.63×10^-6 mol/L,检测线性范围为0.8×10^-4~1.60×10^-3 mol/L。此结果表明,J1是一种良好的用于识别 CN^-的化学传感器,在含水介质中对CN^-具有选择性好、灵敏度高以及抗干扰性强的识别性能。与此同时,基于J1对于CN^-的高选择性识别我们制备了CN^-的检测试纸,该试纸能够方便、快捷、准确地检测水中的CN^-。

关键词: 酰腙类化合物, 氰根离子, 检测试纸, 荧光传感器

Abstract:

We synthesize a novel sensing molecule 1-hydroxy-naphthalen-ethyl-3-hydroxy-naphthalen-methyl-benzoimidazo-bromate(J1) which can carry out a single selective colorimetric dual-channel recognition of CN^- in aqueous medium. When F^-, Cl^-, Br^-, I^-, AcO^-, HSO₄^-, ClO₄^- , H₂PO₄^- , SCN^- and CN^- ions were added respectively in sensing molecule J1's DMSO/H₂O(3:2 volume ratio) HEPES(pH=7.2) solution, only CN^- turns the solution from colorless to deep yellow. In the same time, only CN^- among the ions added in sensing molecule J1's DMSO/H₂O(4:1, volume ratio) HEPES(pH=7.2) solution allows the chemosensor responding with a dramatic color change, from colorless to bright yellow. These recognition processes are not disturbed by other negative ions. This indicates that sensing molecule J1 is a good colorimetric recognition receptor of CN^-. The UV-Vis spectrum of sensing molecule J1 has a wide linear range over CN^- concentration from 3.875×10^-4 mol/L to 2.15×10^-2 mol/L with a detection limit of 1.575×10^-7 mol/L. The linear range of the fluorescence of the sensor for CN^- is at the concentration from 0.8×10^-4 mol/L to 1.60×10^-3 mol/L with a detection limit of 4.63×10^-6 mol/L. The sensing molecule J1 has good selection, high sensitivity and strong antidisturbance on CN^- in aqueous medium. Based on sensing molecule J1's high selection on CN^-, we specially prepare test paper which can test CN^- in water in a convenient, fast and accurate way.

Key words: acyl hydrazone compounds, cyanide ion, test paper, fluorescent sensor

常静, 姚虹, 吴红平, 汪瑞悦, 林奇, 魏太保, 张有明. 一种新型比色荧光双通道水相检测氰根离子的化学传感器[J]. 应用化学, 2016, 33(1): 108-115.

CHANG Jing, YAO Hong, WU Hongping, WANG Ruiyue, LIN Qi, WEI Taibao, ZHANG Youming. A Novel Dual-channel Chemosensor for Cyanide Ion in Aqueous Medium[J]. Chinese Journal of Applied Chemistry, 2016, 33(1): 108-115.

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