Detection of Hg2+ with NBD‐based colorimetric chemosensor: Practical application to water samples and test strips. Issue 2 (16th January 2023)

• Record Type: Journal Article
• Authors: Jung, Sumin; Moon, Sungjin; Kim, Cheal
• Is Part Of: Journal of the Chinese Chemical Society. Volume 70:Issue 2(2023)
• Page Start: 128
• Page End: 135
• Publication Date: 2023-01-16
• Subjects: colorimetric chemosensor -- mercury ion -- NBD -- test strips -- water sample; Chemistry -- Periodicals; Electronic journals; 540.5
• DOI: 10.1002/jccs.202200485
• Languages: English
• ISSNs: 0009-4536

Abstract

Abstract: A new nitrobenzoxadiazole (NBD)‐based chemosensor N′‐(7‐nitrobenzo[c][1, 2, 5]oxadiazol‐4‐yl)thiophene‐2‐carbohydrazide (NTCH) was synthesized for detecting Hg 2+ . NTCH could sense Hg 2+ through a color change method from pale yellow to pink. Binding ratio of NTCH and Hg 2+ was determined to be 1:1 with the analysis of electrospray ionization mass spectrometry and Job plot. Detection limit turned out to be 0.69 μM. In addition, NTCH could be successfully utilized for detecting Hg 2+ in real water samples and visible color test strips. The probing mechanism of NTCH to Hg 2+ was explained with 1 H nuclear magnetic resonance (NMR) titration, Job plot, electrospray ionization mass spectrometry (ESI‐MS), and theoretical calculations. Abstract : A new NBD‐based chemosensor NTCH was developed for the detection of Hg 2+ with a color change method from pale yellow to pink. The detection limit turned out to be 0.69 μM. NTCH could be utilized for detecting Hg 2+ in real water samples and visible color test strips. The probing mechanism of NTCH to Hg 2+ was explained through theoretical calculations.