三联吡啶钌(Ⅱ)/靛蓝三磺酸钾电化学发光放大法灵敏检测臭氧  

Sensitive detection of ozone by amplified electrochemiluminescence of tripyridine ruthenium(Ⅱ)/potassium indigotrisulphonate

作　　者：贺彰瑾 晚豪 鲁理平[1] 高珂 康天放[1] HE Zhangjin;WAN Hao;LU Liping;GAO Ke;KANG Tianfang(Key Laboratory of Beijing on Regional Air Pollution Control,Faculty of Environment science,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]区域大气复合污染防治北京市重点实验室,北京工业大学环境科学系,北京100124

出　　处：《分析试验室》2025年第2期179-185,共7页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(21876005,21936001,21625501);北京市卓越青年科学家计划项目(BJJWZYJH01201910005017)资助。

摘　　要：本研究发展了一种新的(2,2′-联吡啶)钌(II)(Ru(bpy)_(3)^(2+))电化学发光(ECL)体系。以靛蓝三磺酸钾(ITS)作为共反应剂,并基于臭氧(O_(3))对ITS的强氧化作用使体系ECL强度显著增强,开发了一种室内空气样品中O_(3)检测的新方法。探究了Ru(bpy)_(3)^(2+)/ITS体系的ECL机理;发现体系中加入O_(3)后ECL强度增强的原因是O_(3)使ITS分子中2个吲哚基之间的C=C双键断裂,其产物含氨基,从而进一步增强了Ru(bpy)_(3)^(2+)的ECL强度。O_(3)浓度在0.005~5μmol/L范围内,ECL增强效率与O_(3)浓度的对数值呈线性相关,检测限为1 nmol/L。该方法可用于室内空气样品中O_(3)的检测,有望在环境污染监测等领域得到广泛应用。In this study,a new(2,2′-bipyridine)ruthenium(Ⅱ)(Ru(bpy)_(3)^(2+))electrochemiluminescence(ECL)system was developed.With potassium indigotrisulfonate(ITS)as a co-reactant,a new method for the detection of ozone(O_(3))in indoor air samples has been developed based on the strong oxidation of ITS by O_(3),which results in a significant enhancement of the ECL intensity of the system.The ECL mechanism of the Ru(bpy)_(3)^(2+)/ITS system was investigated,and it was found that the enhancement of the ECL intensity after adding O_(3) to the system was due to O_(3) breaking the C=C double bond between the two indole groups in the ITS molecule to generate the product containing an amino group,which further enhances the ECL intensity of Ru(bpy)_(3)^(2+).The results showed that the ECL enhancement efficiency was linearly correlated with the logarithmic value of O_(3) concentration in the range of 0.005-5μmol/L,and the limit of detection was 1 nmol/L.This method can be used for the detection of O_(3) in indoor air samples and is expected to be widely applied in the environmental pollution monitoring.

关 键 词：臭氧 靛蓝三磺酸钾 电化学发光 环境分析 

分 类 号：O657.11[理学—分析化学]