Abstract
Recently, all-inorganic halide perovskite quantum dots (IPQD) as a new fluorescent material with excellent fluorescence properties have attracted wide attention. However, their instability in polar solvents is the main factor hindering their application in analysis. Herein, a heterozygous perovskite (CsPbBr3/Cs4PbBr6) was simultaneously prepared and stabilized by a silylanization strategy using (3-aminopropyl)-triethoxysilane (APTES) and cetyltrimethyl ammonium bromide (CTAB) assisted precipitation encapsulation method. The synthesized CsPbBr3/Cs4PbBr6 emitted an independent fluorescence at 520 nm. The obtained CsPbBr3/Cs4PbBr6 exhibited good stability in ethanol/water mixtures. It was used as a fluorescent probe for sensitively detecting iodide ions (I−) by fluorescence quenching mechanism in the concentration range of 1 ~ 70.0 µM with the detection limit (LOD) of 0.83 µM (relative standard deviation (RSD) = 1.33%, n = 20). The simplicity and high selectivity of the proposed fluorescent analysis method were the prominent features. This work could be extended to the other target ion detection by a perovskite fluorescent quenching.
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This work was supported by the Natural Science Foundation of Anhui Province (Grant Number 2108085ME184), the Innovation Team of the Education Department of Anhui Province (2022AH010019 and zxjj22047), and the Doctoral Scientific Research Startup Foundation of Anhui Jianzhu University (Grant Number 2020QDZ36).
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Lingyu Jiang: Methodology, Investigation, Validation, Writing original draft. Yunyun Qiu Conceptualization, Methodology. Li Xiang: Conceptualization, Writing - review & editing, Jianshe Tang: Supervision, Conceptualization, Resources, Writing - review & editing, Project administration, Funding acquisition. All authors approved the manuscript for publication.
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Jiang, L., Qiu, Y., Xiang, L. et al. APTES and CTAB Synergistic Induce a Heterozygous CsPbBr3/Cs4PbBr6 Perovskite Composite and its Application on the Sensitive Fluorescent Detection of Iodide ions. J Fluoresc (2024). https://doi.org/10.1007/s10895-024-03623-x
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DOI: https://doi.org/10.1007/s10895-024-03623-x