DOI: 10.1111/cote.12717 ISSN:

A nitrobenzodioxazole‐based water‐soluble chemosensor for colorimetric quantification of aqueous hypochlorite

Sungjin Moon, Dongkyun Gil, Cheal Kim
  • Materials Science (miscellaneous)
  • General Chemical Engineering
  • Chemistry (miscellaneous)


A nitrobenzoxadiazole (NBD)‐based colorimetric chemosensor CNA (N,N,N‐trimethyl‐2‐(2‐(7‐nitrobenzo[c][1,2,5]oxadiazol‐4‐yl)hydrazineyl)‐2‐oxoethan‐1‐aminium chloride) was synthesised. The sensor CNA can detect hypochlorite (ClO) via colour variation of yellow to colourless. The detection limit for ClO by CNA was analysed to be 0.36 μM. Moreover, the naked‐eye test strip was successfully applied for ClO detection. The probing mechanism of CNA to ClO was proposed to be a hydrolytic cleavage reaction of CNA by ClO and was demonstrated by electrospray ionisation mass spectrometry (ESI‐MS), Fourier‐transform infrared (FTIR), proton nuclear magnetic resonance (1H NMR) analysis and density functional theory (DFT) calculations.

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