{"title":"Colorimetric reversibility: Aqueous phase recognition of cyanide using smart phone-based device with real sample analysis","authors":"Jyoti Jangir , Kiran , Anju Ranolia , Priyanka , Sandhya Chahal , Snigdha Singh , Anil Duhan , Rahul Kumar Dhaka , Devender Singh , Parvin Kumar , Jayant Sindhu","doi":"10.1016/j.microc.2024.112259","DOIUrl":null,"url":null,"abstract":"<div><div>A novel colorimetric 2-hydrazinobenzothiazole based probe (<strong>BTHP</strong>) was successfully synthesized and employed as an optical cyanide sensor. The interaction of CN<sup>−</sup> with <strong>BTHP</strong> produced a distinct color variation (dark pink color) with a red shift (96 nm) in its absorption spectra. The probe was selective, sensitive and robust towards cyanide ion sensing even in the presence of other competing ions. It could detect cyanide ion upto 0.77 µM, even lower than the limit recommended by WHO (1.9 µM). The binding stoichiometry for <strong>BTHP-CN<sup>−</sup></strong> complex (1:1) was confirmed <em>via</em> Job’s plot. A binding constant of 3.19*10<sup>2</sup> M<sup>−1</sup> was calculated in the recognition process. The cyanide ion recognition mechanism was confirmed using <sup>1</sup>H NMR titration and DFT calculation. The probe coated filter paper test strips displayed dark pink color upon cyanide exposure. <strong>BTHP</strong> can be used reversibly for the visible detection of cyanide in liquid (real water) as well as solid phase (soil). Further, the practical applications of the developed sensor include smartphone based sensing, logic gate fabrication, molecular keypad lock and write-read-erase-read devices.</div></div>","PeriodicalId":391,"journal":{"name":"Microchemical Journal","volume":"208 ","pages":"Article 112259"},"PeriodicalIF":4.9000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchemical Journal","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0026265X24023713","RegionNum":2,"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
A novel colorimetric 2-hydrazinobenzothiazole based probe (BTHP) was successfully synthesized and employed as an optical cyanide sensor. The interaction of CN− with BTHP produced a distinct color variation (dark pink color) with a red shift (96 nm) in its absorption spectra. The probe was selective, sensitive and robust towards cyanide ion sensing even in the presence of other competing ions. It could detect cyanide ion upto 0.77 µM, even lower than the limit recommended by WHO (1.9 µM). The binding stoichiometry for BTHP-CN− complex (1:1) was confirmed via Job’s plot. A binding constant of 3.19*102 M−1 was calculated in the recognition process. The cyanide ion recognition mechanism was confirmed using 1H NMR titration and DFT calculation. The probe coated filter paper test strips displayed dark pink color upon cyanide exposure. BTHP can be used reversibly for the visible detection of cyanide in liquid (real water) as well as solid phase (soil). Further, the practical applications of the developed sensor include smartphone based sensing, logic gate fabrication, molecular keypad lock and write-read-erase-read devices.
期刊介绍:
The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field.
Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.