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Colorimetric Chemosensor for Hg2+ Based on Nuclear Fast Red and a Cationic Polyelectrolyte in Aqueous Solution

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We have developed a colorimetric chemosensor based on an anionic organic dye, commercially available nuclear fast red (NFR) and a cationic polyelectrolyte, poly(diallyldimethylammonium chloride) (PDADMAC) for detection of Hg2+ in aqueous solution at physiological conditions. Upon addition of Hg2+, a bathchromic shift in the absorption was observed concomitantly with color change from pink to reddish violet which was easily detectable by the naked eye, while such a change was not observed for NFR alone, indicating that PDADMAC played an important role in detecting Hg2+. This investigation can propose the simple and valuable construction method for a novel chemosensor by mixture of a water-soluble organic dye and an oppositely charged polyelectrolyte.

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Correspondence to Yasumasa Fukushima.

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Fukushima, Y., Aikawa, S. Colorimetric Chemosensor for Hg2+ Based on Nuclear Fast Red and a Cationic Polyelectrolyte in Aqueous Solution. J Fluoresc 30, 175–180 (2020). https://doi.org/10.1007/s10895-019-02482-1

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  • Colorimetric detection
  • Chemosensor
  • Mercury ion
  • Polyelectrolyte