{"title":"Mechanism of current amplification based on cyclodextrin-supported supramolecular interaction between catechol and ferrocene","authors":"Kai Sato , Hiroshi Kimoto , Takeshi Hashimoto","doi":"10.1016/j.jelechem.2025.118994","DOIUrl":null,"url":null,"abstract":"<div><div>We propose a current amplification mechanism for the rapid and sensitive detection in aqueous solutions, which is based on the supramolecular interaction between catechol and ferrocene in an inclusion complex composed of catechol-modified cyclodextrin and ferrocene. An amplified oxidation current was observed in the cyclic voltammogram of the inclusion complex in phosphate buffer aqueous solution under basic conditions. From the results of electrochemical measurements, we estimated that this oxidation current amplification is due to the concerted oxidation of catechol and ferrocene brought into close proximity <em>via</em> cyclodextrin and the inclusion exchange. Because catechol interacts with boric acid and arsenic acid, this current amplification mechanism shows promising applications in the detection of these chemical species.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118994"},"PeriodicalIF":4.1000,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroanalytical Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1572665725000670","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
We propose a current amplification mechanism for the rapid and sensitive detection in aqueous solutions, which is based on the supramolecular interaction between catechol and ferrocene in an inclusion complex composed of catechol-modified cyclodextrin and ferrocene. An amplified oxidation current was observed in the cyclic voltammogram of the inclusion complex in phosphate buffer aqueous solution under basic conditions. From the results of electrochemical measurements, we estimated that this oxidation current amplification is due to the concerted oxidation of catechol and ferrocene brought into close proximity via cyclodextrin and the inclusion exchange. Because catechol interacts with boric acid and arsenic acid, this current amplification mechanism shows promising applications in the detection of these chemical species.
期刊介绍：
The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied.
Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.
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