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dc.contributor.author周浩zh_CN
dc.contributor.author龙亿涛zh_CN
dc.contributor.authorZHOU Haozh_CN
dc.contributor.authorLONG Yi-taozh_CN
dc.date.accessioned2014-12-19T07:06:18Z
dc.date.available2014-12-19T07:06:18Z
dc.date.issued2014-12-28zh_CN
dc.identifier.citation电化学,2014,20(6):533-537.zh_CN
dc.identifier.issn1006-3471zh_CN
dc.identifier.urihttp://dx.doi.org/10.13208/j.electrochem.140432zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/80548
dc.description.abstract电化学反应中,一个基元电子转移反应仅对应一个电子交换,实际上多电子转移反应也涉及对应数目的单电子转移步骤,分离、辨析每个电子基元反应的氧化还原峰电位十分重要. 本文以辅酶Q0(CoQ0)、亚甲基桥连双辅酶Q0(Bis-CoQ0)为模型,采用循环伏安和方波伏安技术研究其电化学特性,提出了一种应用于多电子转移体系、分析单个电子转移电位的方法. 实验表明,CoQ0经历两步单电子还原反应;Bis-CoQ0中两个醌单元发生强电子相互作用,电极过程为4电子多步转移. 对于表观上的4电子“三步”转移反应,拟用Lorentzian-Gaussian分峰拟合CoQ0和Bis-CoQ0体系方波伏安响应曲线,分别获取每个电子转移步骤的电位,进一步证明Bis-CoQ0经历四分步单电子转移反应,为热力学研究提供更多信息.zh_CN
dc.description.abstractA widely held concept in electrochemistry is that truly elementary electron-transfer reactions always involve the exchange of one electron, therefore, an overall process involving a change of n electrons must involve n distinct electron-transfer steps. It is highly desirable to resolve multiple-step electron transfer reactions into each electron transfer step. The electrochemical behaviors of coenzyme Q0 and methylene-bridged Bis-coenzyme Q0 were investigated by cyclic voltammetry and square wave voltammetry in nonaqueous dichloromethane containing 0.15 mol·L-1 Bu4NClO4 as the supporting electrolyte. The redox reaction of coenzyme Q0 is well described as two chemically reversible one-electron reduction processes. Bis-coenzyme Q0 exhibits three redox waves in voltammetric experiment, as two bridged coenzyme Q0 units show strong intramolecular electron communication. Experimental data were curve fitted with a Gaussian and Lorentzian mixed product function after subtracting the Shirley background. Results show that four-electron reduction of Bis-coenzyme Q0 is preceded by stepwise pathways, defining as four successive, mono-electronic electron-transfer steps.zh_CN
dc.description.sponsorship国家杰出青年基金(No. 21125522)和上海高校特聘教授(东方学者,跟踪计划)资助zh_CN
dc.language.isozhzh_CN
dc.publisher厦门大学《电化学》编辑部zh_CN
dc.relation.ispartofseries生物电分析化学近期研究专辑(南京大学 夏兴华教授主编)zh_CN
dc.relation.ispartofseriesSpecial Issue of Bioelectroanalyical Chemistry (Editor: Professor XIA Xing-hua, Nanjing University)zh_CN
dc.source.urihttp://electrochem.xmu.edu.cn/CN/abstract/abstract10117.shtmlzh_CN
dc.subject辅酶Q0zh_CN
dc.subject电子相互作用zh_CN
dc.subject方波伏安法zh_CN
dc.subject多电子转移zh_CN
dc.subject分峰zh_CN
dc.subject单电子响应辨析zh_CN
dc.subjectcoenzyme Q0zh_CN
dc.subjectelectron communicationzh_CN
dc.subjectsquare-wave voltammetryzh_CN
dc.subjectmulti-electron transferzh_CN
dc.subjectmono-electronic discriminationzh_CN
dc.title生物醌分子伏安响应的多电子转移辨析zh_CN
dc.title.alternativeResolve Mono-Electronic Process in the Voltammetric Behaviors of Multi-Redox Bis-Coenzyme Q0zh_CN
dc.typeArticlezh_CN
dc.description.note作者联系地址:华东理工大学结构可控先进功能材料及其制备教育部重点实验室,上海 200237zh_CN
dc.description.noteAuthor's Address: Key Laboratory of Advanced Material ECUST, Ministry of Education, East China University of Science and Technology, Shanghai 200237, Chinazh_CN
dc.description.note通讯作者E-mail:ytlong@ecust.edu.cnzh_CN


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