有机纳米线电化学发光传感器

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• 英文论文题名：Electrogenerated Chemiluminescence sensor of Organic Nanowires
• 论文作者：李青 ; 赵永生
• 英文论文作者：Qing Li ; Yong Sheng Zhao ; Chemistry and Pharmaceutical Engineering ; Hebei University of Science and Technology ; Beijing National Laboratory for Molecular Sciences ; Institute of Chemistry ; Chinese Academy of Sciences
• 年：2016
• 作者机构：河北科技大学;中国科学院化学研究所;
• 论文关键词：电化学发光 ; 金属有机纳米线 ; 生物传感器 ; 还原氧化石墨烯
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
• 语种：中文
• 分类号：O657.1;TP212
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：146k
• 原文格式：D
• 会议级别：全国

摘要

电化学发光(electrogenerated chemiluminescence,ECL)是指通过施加一定的电压进行电化学反应,在电极表面产生一些电生的物质,然后这些电生物质之间或电生物质与体系中某些组分之间通过电子传递形成激发态,由激发态返回到基态而产生的一种发光现象[1]。电化学发光生物传感器作为一种有价值的检测装置,其在检测应用中已经得到越来越多的关注[2-3]。我们选择钌联吡啶(tris(2,2'-bipyridyl)ruthenium(II),Ru(bpy)_3~(2+))制备成纳米线,这是一种典型的电化学发光试剂[1]。这种纳米线被掺有还原氧化石墨烯的全氟磺酸阳离子交换树脂膜固定在玻碳电极上,最终构筑成电化学发光传感器。还原氧化石墨烯的加入明显的增加了Nafion膜的导电性,因此增强了钌联吡啶纳米线(Ru NWs)的电化学信号,同时影响了Ru NWs的电化学发光的强度。制备的生物传感器在于TPr A相互作用时,具有很好的ECL效率和优良的稳定性。在检测多巴胺时,这个ECL传感器还表现出了非常高的电化学发光响应:具有宽的检测范围和低的检测线。本工作为后续的金属有机配合物纳米材料的研究和传感器设计的进一步开展提供重要的借鉴和指导意义。
Electrochemiluminescence(ECL), also known as electrogenerated chemiluminescence, is probably best described as chemiluminescence(CL) produced directly or indirectly in situ when a suitable potential is applied at the working electrode.In this work, we chose tris(2,2'-bipyridyl)ruthenium(II)(Ru(bpy)_3~(2+)), a metal-organic complex material, to prepare nanowires, which were subsequently applied for the construction of electrochemiluminescence(ECL) biosensor by immobilizing them onto a glassy carbon electrode(GCE) with graphene-Nafion composite films. The graphene therein, being a two-dimensional carbon nanomaterial with outstanding electronic properties, can obviously improve the conductivity of the Nafion film, as well as enhance the electrochemical signal and ECL intensity of the Ru(bpy)_3~(2+) nanowires(Ru NWs) at low graphene concentration. The developed biosensor exhibited excellent ECL stability with tripropylamine(TPr A) as co-reactant. The ECL biosensor manifested high sensitive ECL response in a wide linear range and low detection limit for the detection of dopamine. The large electro-active area of the nanowires and the enhancement effect of the graphene played critical roles in the high detection performance of the ECL biosensor. The results demonstrated herein may provide a useful enlightenment for the design of more sensitive ECL biosensors.

引文

[1]Richter,M.M.Chem.Rev.2004,104,3003.
    [2]Sun,X.;Du,Y.;Zhang,L.;Dong,S.;Wang,E.Anal.Chem.2007,79,2588.
    [3]Guo,Z.H.;Dong,S.J.Anal.Chem.2004,76,2683.