A deep-red xanthene-based highly sensitive fluorescent probe for detection of hypochlorite |
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Authors: | Jie Sun Mehrigul Abdulahat Ablikim Obolda Xuelian Ma Parida Hazretomar Zhaoze Ding Jinquan Wang |
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Affiliation: | 1. College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumqi, P. R. China;2. College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, P. R. China |
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Abstract: | As an oxidant, deodorant and bleaching agent, the hypochlorous acid (HClO) and hypochlorite (ClO−) are widely used in corrosion inhibitors, textile dyes, pharmaceutical intermediates and in our daily lives. However, excess usage or aberrant accumulation of ClO− leads to tissue damage or some diseases and even cancer. Therefore, it is necessary to develop a fluorescent probe that specifically identifies ClO−. In this article, we synthesized a deep-red xanthene-based fluorescent probe (XA-CN). The strong electron deficient group dicyano endows the probe XA-CN deep-red fluorescent emission with high solubility, selectivity and sensitivity for ClO− detection. Studies showed that the probe demonstrated turn-off fluorescence (643 nm) at the presence of ClO− in dimethylsulfoxide/phosphate-buffered saline 1:1 (pH 9) solution with a limit of detection of 1.64 μM. Detection mechanism investigation revealed that the electron deficient group -CN and the hydroxyl group was oxidized into aldehyde or carbonyl groups at the presence of ClO−, resulting ultraviolet-visible absorption of the probe blue shifted and turned-off fluorescence. Furthermore, XA-CN was successfully used for the detection of ClO− in tap water samples. |
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Keywords: | ClO− detection deep-red fluorescence tap water |
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