{"title":"An Easy Detection of Sulfide by an Imine-Bond Cleavage-Based Fluorescence Chemosensor: Smartphone and Paper-Strip Applications","authors":"Chanwoo Song, Jae Jun Lee, Hyejin Nam, Cheal Kim","doi":"10.1007/s11814-024-00334-8","DOIUrl":null,"url":null,"abstract":"<div><p>We designed an imine-bond cleavage-based fluorescent chemosensor <b>CDH</b> ((<i>E</i>)-(5-chloro-2-((3,5-dichloro-2-hydroxybenzylidene)amino)phenyl)(phenyl)methanone) for detecting S<sup>2−</sup>. The sensor <b>CDH</b> selectively sensed S<sup>2−</sup> among various anions through fluorescent change. The fluorescent change was cyan turn-on from colorless with a high quantum yield (λ<sub>ex</sub> = 427 nm, Φ = 0.486), resulting in strong fluorescent intensity. With the result of Job plot, the reaction of S<sup>2−</sup> and <b>CDH</b> turned out to be a 1:1 interaction. The detection limit for S<sup>2−</sup> of <b>CDH</b> was 2.85 µM. The reaction process of S<sup>2−</sup> by <b>CDH</b> was demonstrated to be imine-bond cleavage through ESI-mass, <sup>1</sup>H NMR titration, and theoretical calculations. Additionally, test-strip and smartphone applications were successfully constructed for S<sup>2−</sup> detection, and these findings revealed that <b>CDH</b> could be effectively utilized for sulfide sensing without sophisticated instruments.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"669 - 678"},"PeriodicalIF":2.9000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11814-024-00334-8","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
We designed an imine-bond cleavage-based fluorescent chemosensor CDH ((E)-(5-chloro-2-((3,5-dichloro-2-hydroxybenzylidene)amino)phenyl)(phenyl)methanone) for detecting S2−. The sensor CDH selectively sensed S2− among various anions through fluorescent change. The fluorescent change was cyan turn-on from colorless with a high quantum yield (λex = 427 nm, Φ = 0.486), resulting in strong fluorescent intensity. With the result of Job plot, the reaction of S2− and CDH turned out to be a 1:1 interaction. The detection limit for S2− of CDH was 2.85 µM. The reaction process of S2− by CDH was demonstrated to be imine-bond cleavage through ESI-mass, 1H NMR titration, and theoretical calculations. Additionally, test-strip and smartphone applications were successfully constructed for S2− detection, and these findings revealed that CDH could be effectively utilized for sulfide sensing without sophisticated instruments.
期刊介绍：
The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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