Cyanine-based dyes: highly sensitive sensors for the detection of the hypochlorite levels in drinking water based on fluorometry.

Hafez, Nermeen S.; Amer, Wael A.; Okba, Ehab A.; Alganzory, Hussein H.; Ebeid, Elzeiny M.

doi:10.21608/djs.2023.206451.1108

Cyanine-based dyes: highly sensitive sensors for the detection of the hypochlorite levels in drinking water based on fluorometry.

Document Type : Research and Reference

Authors

¹ Department of Chemistry, Faculty of Science, Tanta University, Tanta, Egypt

² Department of Chemistry, Faculty of Science, Benha University, Benha, Egypt.

³ Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.

10.21608/djs.2023.206451.1108

Abstract

Drinking water is frequently disinfected with chlorine, and it is necessary to quantify any remaining chlorine in the form of the hypochlorite ion (ClO-). Many sensors are in use now, including colorimetric, fluorometric, and electrochemical ones, but detection limitations and simplicity of application continue to be a problem. This study discusses the findings of two novel ClO- sensors based on solvent-free microwave synthesis. The two sensors display rapid fluorescence response for ClO- with excellent selectivity over other analyte species as well as a low detection limit.

According to fluorometric performance, the sensors have low detection limits of 1.71 nM and 2.46 nM for sensors I and II, respectively, and they can detect ClO- unaffected by other dangerous water pollutants. For the detection of ClO- in real water samples, the approach produced good recovery results, ranging from 98 to 102.1%. These sensors offer a straightforward and useful approach for tracking ClO- levels in the water, as well as a low-cost and highly sensitive detection method. The sensing mechanism is explained in terms of the radical cations that are produced when the cyanine sensors I and II are exposed to ClO-.

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