基于配位增强效应均相活化过氧单硫酸盐的比色法检测钴离子(Ⅱ)

引用本文: 明闰勉, 张才灵, 谢良波, 尚登辉, 李轶. 基于配位增强效应均相活化过氧单硫酸盐的比色法检测钴离子(Ⅱ)[J]. 分析化学, 2021, 49(9): 1515-1522. doi: 10.19756/j.issn.0253-3820.210480 shu

Citation: MING Run-Mian, ZHANG Cai-Ling, XIE Liang-Bo, SHANG Deng-Hui, LI Yi. Colorimetric Detection of Co²⁺ Based on Ligand Effect Enhancement for Homogeneous Activation of Peroxymonosulfate[J]. Chinese Journal of Analytical Chemistry, 2021, 49(9): 1515-1522. doi: 10.19756/j.issn.0253-3820.210480 shu

基于配位增强效应均相活化过氧单硫酸盐的比色法检测钴离子(Ⅱ)

天津大学理学院, 天津 300072

通讯作者: 李轶,E-mail:liyi@tju.edu.cn

基金项目:
国家自然科学基金项目（No.21874099）和天津市自然科学基金项目（No.20YFZCSN01070）资助。

摘要: 钴在人体中具有重要作用，但高浓度的钴会引起一系列疾病。过氧单硫酸盐（PMS）是一种具有不对称结构的氧化剂，一定浓度的Co²⁺可催化活化PMS产生活性自由基。Co²⁺与Ac^-之间有配位增强效应，向Co²⁺-PMS体系中引入给电子体Ac^-可加快电子传递，从而增强Co²⁺对PMS的催化活性，产生更多的硫酸根自由基（SO₄^·-）和羟基自由基（·OH），进而增强氧化3，3'，5，5'-四甲基联苯胺（TMB）的能力。基于Co²⁺对PMS均相催化活化能力以及Ac^-的配位增强效应，本研究设计了一种无需催化剂的绿色高效的Co²⁺比色检测方法。在优化的条件下，即1.0 mmol/L NaAc、0.4 mmol/L TMB和0.3 mmol/L PMS，温度为25℃的条件下，Co²⁺浓度在0.5~3.0 μmol/L范围内与体系在652 nm处的吸光度（A_{652 nm}）呈良好的线性关系，检出限（S/N=3）为29 nmol/L。本方法检测Co²⁺的特异性良好，与其它检测Co²⁺的方法相比，无需使用大型仪器，不需要复杂的操作过程，可快速、高效、绿色地实现Co²⁺的检测。

关键词:

English

Colorimetric Detection of Co²⁺ Based on Ligand Effect Enhancement for Homogeneous Activation of Peroxymonosulfate

School of Science, Tianjin University, Tianjin 300072, China

Corresponding author: LI Yi, liyi@tju.edu.cn

Received Date: 05 May 2021
Revised Date: 28 May 2021
Fund Project:
Supported by the National Natural Science Foundation of China (No.21874099) and the Natural Science Foundation of Tianjin City of China (No.20YFZCSN01070).

Abstract: Cobalt ion (Co²⁺) plays an important role in human body. But high concentration of Co²⁺ can cause a series of diseases. Peroxymonosulfate (PMS) is an oxidant with an asymmetric structure, and a certain concentration of Co²⁺ can catalyze the activation of PMS to produce active free radicals. Studies have shown that there is ligand effect between Co²⁺ and Ac^-. The introduction of electron donor Ac^- into Co²⁺-PMS accelerates electron transfer, so the catalytic activity of Co²⁺ towards PMS is enhanced and more sulfate radical (SO₄^·-) and hydroxyl radical (·OH) are produced, which results in corresponding enhancement of the ability of 3,3',5,5'-tetramethylbenzidine (TMB) oxidation. Based on the homogeneous catalytic activity of Co²⁺ on PMS and the enhanced coordination effect of Ac^-, a novel, catalyst free, green and efficient colorimetric detection method for Co²⁺ was designed in this work. When the concentrations of NaAc, TMB and PMS were 1.0, 0.4 and 0.3 mmol/L, respectively, and the temperature was set at 25℃, the method was specific for the detection of Co²⁺ and had good anti-interference ability for 20 kinds of interfering ions. The concentration of Co²⁺ in the concentration range of 0.5-3.0 μmol/L showed a good linear relationship with the absorbance of the system at 652 nm (A_{652 nm}), and the detection limit (S/N=3) was calculated to be 29 nmol/L. Compared with other detection methods for Co²⁺, this method established a fast, efficient and green platform for Co²⁺ detection without synthetic materials, large instruments and complex operation procedures.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

基于配位增强效应均相活化过氧单硫酸盐的比色法检测钴离子(Ⅱ)

通讯作者: 李轶,E-mail:liyi@tju.edu.cn

English

Colorimetric Detection of Co²⁺ Based on Ligand Effect Enhancement for Homogeneous Activation of Peroxymonosulfate

Corresponding author: LI Yi, liyi@tju.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于配位增强效应均相活化过氧单硫酸盐的比色法检测钴离子(Ⅱ)

通讯作者: 李轶,E-mail:liyi@tju.edu.cn

English

Colorimetric Detection of Co2+ Based on Ligand Effect Enhancement for Homogeneous Activation of Peroxymonosulfate

Corresponding author: LI Yi, liyi@tju.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

Colorimetric Detection of Co²⁺ Based on Ligand Effect Enhancement for Homogeneous Activation of Peroxymonosulfate

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs