Imaging Science and Photochemistry ›› 2017, Vol. 35 ›› Issue (3): 290-296.DOI: 10.7517/j.issn.1674-0475.2017.03.290

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Cyanine Dye-loading Polymer Nanoparticle for Colorimetric Detection of Hypochlorous Acid

YU Danping1, LIU Yawei2, SHEN Liang1, LI Fuyou2   

  1. 1. Jiangxi Engineering Laboratory of Waterborne Coating, School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, Jiangxi, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Received:2017-02-10 Revised:2017-02-26 Online:2017-05-15 Published:2017-05-15

Abstract:

As a strong oxidant, HClO was widely applied in people everyday life, so it is great important to monitor the concentration of HClO. Herein, we developed a new strategy to resolve the deficiency of photobleaching and poor water-solubility for the current HClO probes. On the basis of the fact that hypochlorite can destroy the conjugated structure of the organic dye, a polystyrene nanoparticle loaded with the Cy7 dye (PS-Cy7) had been designed and synthesized. Moreover, PS-Cy7 with the size of 78 nm was carried out as colorimetric nanoprobe for detection of hypochlorite anion (ClO-). The nanoprobe exhibits good water-solubility and high photostability. The detection limit of PS-Cy7 for hypochlorite in water was 0.22 μmol/L. Furthermore, PS-Cy7 can specifically respond to hypochlorite in presence of other reactive oxygen species. The experimental result demonstrated that PS-Cy7 was a colorimetric nanoprobe with high sensitivity and selectivity of hypochlorite.

Key words: colorimetric detection, hypochlorous acid, cyanine dye, polymer nanoparticle