Visualizing stimulus‐responsive dual‐ligand fluorescent probes for hypochlorite: A novel strategy for real application in tap water

• Published in: Luminescence (Chichester, England) England), 2023-06, Vol.38 (6), p.722-728
• Main Authors: Han, Jianhong, Wang, Yuting, Ren, Zehua, Zhang, Lianke, Hu, Shuting, Li, Yumei, Liu, Pai
• Format: Article
• Language: English
• Subjects: ClO− detection; Colour; Coordination polymers; Damage; Detection; Disinfectants; Drinking water; Drinking Water - analysis; Filter paper; Fluorescence; Fluorescent Dyes - chemistry; Fluorescent indicators; Health hazards; Hypochlorous Acid - analysis; Kidney diseases; Ligands; luminol; Luminol - analysis; Lung diseases; Metals; Nanoparticles; Polymers; Probes; Sensors; Spectrometry, Fluorescence - methods; stimulus responsive; tap water
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.4500

As an effective ingredient of disinfectants, ClO− inevitably remains in water, which induces potential health hazards such as lung damage and kidney disease. In this study, we synthesized stimulus‐responsive dual‐ligand luminol‐Tb‐GMP coordination polymer nanoparticles (luminol‐Tb‐GMP CPNPs) as highly selective fluorescent probes for the real‐time and visual detection of ClO−. CPNPs consist of Tb3+, a nuclear metal, that coordinates with GMP and luminol, an auxiliary ligand. GMP can be oxidized by ClO− and damage its structure, resulting in fluorescence quenching of CPNPs. The two‐ligand CPNPs sensor has a rapid fluorescent response, significant fluorescent color change, and high sensitivity, with a linear range of 2–18 μM and a detection limit of 0.14 μM. It has been successfully used to detect ClO− in tap water, fountain water, and drinking water. Simultaneously, the portable filter paper strip was prepared to expand the range of applications outside the laboratory, which will provide a promising application for the real‐time and semiquantitative analysis of ClO−. Dual‐ligand fluorescent probes were easily and rapidly prepared for the detection of ClO‐. The probe provided excellent detection performance in a useful range; the detection limit was 0.14 μM. The probe has better selectivity and sensitivity and can be used in a variety of aqueous environments. The visualizing and portable detection method was realized by preparing into filter paper strips.