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Host-Guest Recognition-Driven Colorimetric/Fluorescent Nanosensor Enables Ultrasensitive Hazardous Dodine Detection

A-Ling Tang1,2, Shuai Tan1, Wei Niu1

  • 1State Key Laboratory of Green, Pesticides Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China.

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Summary

A novel nanosensor detects the fungicide Dodine (DD) with high sensitivity and speed. This technology aids food safety, environmental monitoring, and reveals antifungal mechanisms.

Keywords:
anti‐counterfeitingbroad‐spectrum applicationdodinehost‐guest nanosensorultrafast response

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Area of Science:

  • Supramolecular chemistry
  • Nanotechnology
  • Analytical chemistry

Background:

  • Global reliance on pesticides like the fungicide Dodine (DD) has led to ecological and health concerns.
  • Environmental persistence and bioaccumulation of DD necessitate advanced real-time monitoring technologies.
  • Current detection platforms for DD are underdeveloped, lacking multifunctionality.

Purpose of the Study:

  • To develop a novel, multifunctional nanosensor for the rapid and sensitive detection of Dodine (DD).
  • To engineer cucurbit[7]uril-based nanoarchitectures for enhanced photostability and dual-mode sensing.
  • To explore applications beyond detection, including information encryption and biological mechanism elucidation.

Main Methods:

  • Host-guest recognition strategy using cucurbit[7]uril-engineered nanoarchitectures (RhB-Py1&Q[7]).
  • Development of a dual-mode (colorimetric/fluorescent) rod-shaped nanosensor.
  • Field trials for on-site detection and quantification in various environmental matrices.
  • Biological investigations using zebrafish models and plant studies.

Main Results:

  • The nanosensor exhibits ultrafast response times (~12 s) and ultra-trace sensitivity (LOD = 6 nm).
  • Exceptional selectivity for Dodine (DD) was achieved.
  • Successful on-site detection and quantification of DD in crops, soils, and aquatic systems.
  • Demonstrated programmable fluorescence encryption capabilities.
  • Provided real-time insights into antifungal action, bioaccumulation pathways, and plant transport mechanisms.

Conclusions:

  • Cucurbit[7]uril-engineered nanoarchitectures offer a promising platform for developing stable fluorescent sensors.
  • The developed nanosensor advances analytical tool development for food safety monitoring and environmental surveillance.
  • The study provides new insights into antifungal mechanisms and opens avenues for information encryption.