Citation: Shang-Wei Yuan, Li Zeng, Li Wu, Ji-Li Yuan, Chao Kang, Xi Zeng, Pei-Hua Ma, Xin Xiao. A smartphone sensing platform based on cucurbit[8]uril for rapid visual quantitative detection of S₂O₈^2-[J]. Chinese Chemical Letters, ;2026, 37(7): 111962. doi: 10.1016/j.cclet.2025.111962 shu

A smartphone sensing platform based on cucurbit[8]uril for rapid visual quantitative detection of S₂O₈^2-

Shang-Wei Yuan ^{a, 1} ,
Li Zeng ^{a, 1} ,
Li Wu ^a ,
Ji-Li Yuan ^b ,
Chao Kang ^a ,
Xi Zeng ^a ,
Pei-Hua Ma ^a ,
Xin Xiao ^{a, *,}

a.
Guizhou Key Laboratory of Macrocyclic and Supramolecular Chemistry, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
b.
Department of Polymer Materials and Engineering, College of Materials & Metallurgy, Guizhou University, Guiyang 550025, China

xxiao@gzu.edu.cn

Received Date: 15 May 2025
Revised Date: 30 September 2025
Accepted Date: 13 October 2025
Available Online: 14 October 2025

Figures(6)

In this paper, a novel multicolor-responsive fluorescent probe for the rapid and sensitive detection of persulfate ions (S₂O₈^2-), KT@Q[8], is constructed via host-guest interactions between cucurbit[8]uril (Q[8]) and 3,6-bis[4-(4-bromophenyl)pyridinium]-carbazole dichloride (KT). Upon interaction with S₂O₈^2-, the KT@Q[8] probe exhibits a fluorescence emission blue shift concurrent with a fluorescence color transition gradually from yellow to green. Notably, the probe demonstrates high selectivity for S₂O₈^2- even in the presence of competing anions and sulphur-containing metal salts, achieving a detection limit of 0.38 μmol/L. When integrated with smartphone-based RGB analysis, this probe enables rapid visual quantification of S₂O₈^2- without requiring sophisticated instrumentation, and can be effectively used to detect S₂O₈^2- in tap water, lake water, honey, and white wine. Furthermore, machine learning algorithms enhanced predictive accuracy during data analysis. Overall, this work not only advances a practical approach for persulfate monitoring but also expands the application range of cucurbituril-based fluorescence supramolecular assemblies.
- Cucurbit[8]uril,
- KT,
- S₂O₈^2-,
- Fluorescent probe,
- Supramolecular self-assembly
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A smartphone sensing platform based on cucurbit[8]uril for rapid visual quantitative detection of S2O82-

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通讯作者: 陈斌, bchen63@163.com

A smartphone sensing platform based on cucurbit[8]uril for rapid visual quantitative detection of S₂O₈^2-