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  

A Novel Dual-channel Chemosensor for Cyanide Ion in Aqueous Medium

作　　者：常静[1] 姚虹[1] 吴红平[1] 汪瑞悦 林奇[1] 魏太保[1] 张有明[1] 

机构地区：[1]西北师范大学化学化工学院,兰州730000

出　　处：《应用化学》2016年第1期108-115,共8页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(21064006;21161018;21262032);甘肃省自然科学基金(1010RJZA018);教育部长江学者和创新团队发展计划(IRT1177)资助~~

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^-、HSO_4^-、ClO_4^-、H_2PO_4^-、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^-。We synthesize a novel sensing molecule 1-hydroxy-naphthalen-ethyl-3-hydroxy-naphthalen-methylbenzoimidazo-bromate（ J1） which can carry out a single selective colorimetric dual-channel recognition of CNin aqueous medium. When F^-,Cl^-,Br^-,I^-,Ac O^-,HSO4^-,ClO4^-,H2PO4^-,SCN-and CN-ions were added respectively in sensing molecule J1＇ s DMSO / H_2O（ 3 ∶ 2 volume ratio） HEPES（ p H = 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 / H_2O（ 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^-4mol/L to 2. 15 × 10^-2mol / L with a detection limit of 1. 575 × 10^- 7mol / L. The linear range of the fluorescence of the sensor for CN-is at the concentration from 0. 8 × 10^- 4mol / L to 1. 60 ×10^- 3mol / L with a detection limit of 4. 63 × 10^- 6mol / 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.

关 键 词：酰腙类化合物 氰根离子 检测试纸 荧光传感器 

分 类 号：O611.5[理学—无机化学]