二茂铁醛缩邻氨基巯酚shifft碱修饰电极的制备及对Cd~(2+)的选择性和高灵敏度的检测
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摘要
利用shifft碱反应将邻氨基苯硫酚和二茂铁在一定条件下合成功能化二茂铁醛缩邻氨基巯酚shifft碱(Fc-C=N-C_6H_5S)。在玻碳电极上电沉积纳米金,利用Fc-C=N-C_6H_5S的巯基与纳米金的键合作用自组装制备Fc-C=N-C_6H_5S修饰电极。Fc-C=N-C_6H_5S富电子体系特性使该修饰电极能与Cd2+发生配位作用,结合方波伏安法用于Cd2+电化学检测。据此建立了一种高灵敏度、高选择性的测定Cd2+含量的分析方法。在0.1mol/L的HNO3介质中,Cd2+在2.0nM-80.0nM浓度范围内呈现较好的线性关系。检出限为0.95nM。
A new functionalized Fc-C=N-C_6H_5 S was synthesized by shiff base reaction using O-aminothiophenol and ferrocene as raw materials under certain conditions.The Fc-C=N-C_6H_5 S modified electrode was prepared by self-assembly using the interaction between sulfhydryl group and nano-gold on the surface of electrode after gold nanoparticles were electrodeposited on the glass carbon electrode.Fc-C=N-C_6H_5 S rich electronic system features enable the modified electrode to coordinate with Cd2+,which is used for Cd2+electrochemical detection with square wave voltammetry.A new analytical method was established based on the rich electronic system features of Fc-C=N-C_6H_5 S for the determination of Cd2+content with high sensitivity and selectivity.The linear range for detection of the Cd2+is 2.0×10-9 M-8.0×10-8 M with a low detection limit of 0.95×10-9 M.
A new functionalized Fc-C=N-C_6H_5 S was synthesized by shiff base reaction using O-aminothiophenol and ferrocene as raw materials under certain conditions.The Fc-C=N-C_6H_5 S modified electrode was prepared by self-assembly using the interaction between sulfhydryl group and nano-gold on the surface of electrode after gold nanoparticles were electrodeposited on the glass carbon electrode.Fc-C=N-C_6H_5 S rich electronic system features enable the modified electrode to coordinate with Cd2+,which is used for Cd2+electrochemical detection with square wave voltammetry.A new analytical method was established based on the rich electronic system features of Fc-C=N-C_6H_5 S for the determination of Cd2+content with high sensitivity and selectivity.The linear range for detection of the Cd2+is 2.0×10-9 M-8.0×10-8 M with a low detection limit of 0.95×10-9 M.
引文
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[3]郭红媛,微苗苗,吴锁柱,等.电沉积羧基化石墨烯修饰的玻碳电极电化学检测镉离子[J].山西农业大学学报(自然科学版),2018,38(1):69-72.
[4]杨琰宁,谢云飞,姚卫蓉.玻碳电极的石墨烯修饰研究及其电化学应用[J].食品工业科技,2015,36(19):275-279.
[5]李永红.新型化学修饰碳离子液体电极的构建及其应用[D].湖南大学(博士学位论文),2012.
[6]赖丽华,徐融冰.金微粒修饰的电极对细胞色素C的直接电化学响应[J].安徽化工,2010(4):51-54.
[7]刘蓉,钟桐生,龙立平,等.氯丙嗪分子印迹敏感膜传感器的制备与应用[J].应用化学,2013(11):133-137.
[8]杨梅,金葆康.两种二茂铁巯基化合物的合成表征及其修饰金电极电化学性质的研究[J].分析科学学报,2008,24(4):373-376.
[9]杨梅,吴菊,谢成根.L-(8-羟基-5-甲基喹啉)半胱氨酸修饰电极的制备及其对汞离子选择性检测[J].分析科学学报,2014,30(3):437-440.
[10]左从玉.二茂铁衍生物的合成、表征及其性质研究[D].安徽大学(硕士学位论文),2004.
[11]张剑荣,杨曦,张祖训.超微电极研究——电迁移对准稳态线性扫描伏安法的影响[J].高等学校化学学报,1994(10):1454-1458.
[12]江平,常军霞,朱强,等.基于石墨烯/金纳米复合材料的无酶葡萄糖传感器[J].分析科学学报,2014(3):82-85.
[13]杨海旭,卢亚平,施璠,等.多巴胺在电沉积石墨烯修饰碳分子线电极上的电化学测定[J].分析测试学报,2013(9):101-105.