Synthesis of L-tyrosine-capped ZnSe quantum dots and its application to hypochlorite determination in water |
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| Authors: | Mohammad Saeid Hosseini Zahra Hashemi-Pour Navid Hosseini |
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| Institution: | 1. Department of Chemistry, University of Birjand, Birjand, Iranmshosseini1336@yahoo.com;3. Department of Chemistry, University of Birjand, Birjand, Iran;4. Department of Civil &5. Environmental Engineering, Amirkabir University of Technology, Tehran, Iran |
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| Abstract: | In this study, a new sensitised spectrofluorometric method was presented as a probe sensor for hypochlorite analysis in oral and tap water samples. By capping L-tyrosine (Tyr) on ZnSe nanoparticles, stable quantum dots (QDs) were obtained. In comparison with Tyr, the fluorescence (FL) emission of Tyr-capped ZnSe is enhanced and shifted to greater wavelength, which causes to enhance the sensitivity for the determination of hypochlorite. Based on the FL quenching of the Tyr-capped ZnSe QDs, hypochlorite concentration was detected at buffering pH of 7 in the range of 5.15 × 10?5?2.57 × 10?2 g L?1. Relative standard deviation and detection limit were found to be 0.83% and 2.06 × 10?5 g L?1, respectively. In comparison with the other methods of hypochlorite determination, this method is simple, fast and inexpensive, with low sample volume consumption. It also exhibits a good selectivity. |
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| Keywords: | Fluorescence quenching L-tyrosine ZnSe nanoparticle hypochlorite determination quantum dots |
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