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Article

Fast and Sensitive Determination of Iodide Based on Ternary Chalcogenides Nanoparticles

by
Zhitai Wang
1,
Nengtao Wu
2,
Weihao Wang
2,
Yaozheng Hu
1,
Zhijie Luo
2,
Yuhui Zheng
2,* and
Qianming Wang
2,*
1
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2
School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China
*
Authors to whom correspondence should be addressed.
Molecules 2024, 29(19), 4751; https://doi.org/10.3390/molecules29194751
Submission received: 18 September 2024 / Revised: 1 October 2024 / Accepted: 2 October 2024 / Published: 8 October 2024
(This article belongs to the Special Issue Exclusive Contributions by the Editorial Board Members (EBMs) of the Inorganic Chemistry Section of Molecules 2024)
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Abstract

A fluorescent probe based on ternary AgFeS2 quantum dots has been prepared for the design of ternary chalcogenides. The nanoparticles are synthesized with oleylamine as a stabilizer at a low temperature (particle size in the range of 2 to 3 nm) and they exhibit an intense blue emission in aqueous media. As for their internal structure, each nanoparticle’s relative stoichiometric ratio (AgFe1.01S1.91) is very close to the theoretical value of 1:1:2. Their magnetic properties have been studied with a vibrating sample magnetometer and they have ferromagnetism between 4 K and 298 K (applied magnetic field ranging between −10,000 and 10,000 Oe). In the presence of iodide ions, the emission at 458 nm derived from AgFeS2 QDs has been observed to give rise to fluorescence quenching. The detection system is based on a static quenching process and morphological change between iodide ions and AgFeS2, which has a good linear range from 0 to 37.5 μmol/L, with a limit of detection of 0.99 μM. The nanoprobe responds within 30 s for the efficient detection of iodide. Such functional quantum dots will provide a powerful indicator in environmental and bio-sensing applications.
Keywords: AgFeS2; nanocrystals; luminescence; fluorescence sensor; iodide ions AgFeS2; nanocrystals; luminescence; fluorescence sensor; iodide ions

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MDPI and ACS Style

Wang, Z.; Wu, N.; Wang, W.; Hu, Y.; Luo, Z.; Zheng, Y.; Wang, Q. Fast and Sensitive Determination of Iodide Based on Ternary Chalcogenides Nanoparticles. Molecules 2024, 29, 4751. https://doi.org/10.3390/molecules29194751

AMA Style

Wang Z, Wu N, Wang W, Hu Y, Luo Z, Zheng Y, Wang Q. Fast and Sensitive Determination of Iodide Based on Ternary Chalcogenides Nanoparticles. Molecules. 2024; 29(19):4751. https://doi.org/10.3390/molecules29194751

Chicago/Turabian Style

Wang, Zhitai, Nengtao Wu, Weihao Wang, Yaozheng Hu, Zhijie Luo, Yuhui Zheng, and Qianming Wang. 2024. "Fast and Sensitive Determination of Iodide Based on Ternary Chalcogenides Nanoparticles" Molecules 29, no. 19: 4751. https://doi.org/10.3390/molecules29194751

APA Style

Wang, Z., Wu, N., Wang, W., Hu, Y., Luo, Z., Zheng, Y., & Wang, Q. (2024). Fast and Sensitive Determination of Iodide Based on Ternary Chalcogenides Nanoparticles. Molecules, 29(19), 4751. https://doi.org/10.3390/molecules29194751

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