Authors
Rongsheng Song, Die Su, Ya Deng, Dongxue Sun, Xia Xu, Bing Hu
Published in
Mikrochimica acta. Volume 193. Issue 11. Oct 06, 2026. Epub Oct 06, 2026.
Abstract
Mn2+-doped CsPbCl3 quantum dots (Mn2+:CsPbCl3 QDs) exhibit high photoluminescence quantum yields (PLQYs) and extended carrier diffusion lengths, but their use in aqueous environmental monitoring is hindered by poor water stability and fluorescence quenching. To address this challenge, a surface engineering strategy was employed in which the surfaces of Mn2+:CsPbCl3 QDs were coated with star-shaped polyethylene glycol-1000 (PEG1000) ligands, it has significantly improved stability in aqueous solutions while maintaining optical performance. Taking into account the steric hindrance and surface passivation effects of multi-arm star-shaped PEG1000, the three-arm and four-arm star-shaped PEG1000 encapsulated Mn2+:CsPbCl3 QDs exhibit good stability under weakly acidic conditions. Crystal Violet (CV) is an effective fluorescence quencher. Using the advantages of enhanced water stability of QDs and the fluorescence inner filter effect (IFE) between CV and QDs, a fluorescence detection platform was constructed. This platform enables quantitative detection of CV in aqueous solutions, achieving a detection limit of 1.136 µmol/L and a linear dynamic range of 0-23.78 µmol/L. This method presents a promising strategy for monitoring environmental pollutants and demonstrates distinct advantages in challenging aqueous matrices through the utilization of perovskite nanomaterials.
PMID:
42837025
Bibliographic data and abstract were imported from PubMed on 07 Oct 2026.
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