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Ratiometric fluorescence probes for visible detection and accurate identification of MPEA vapor

Xin Miao1, Chunxiao Wu1, Yuanxing Xia2

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.

Nature Communications
|December 6, 2024
PubMed

Insights

New ratiometric fluorescence probes (PyDPA and PyDMA) enable rapid, visible detection of methamphetamine (MA) and its simulant, methylphenethylamine (MPEA). A smartphone system allows for on-site, ppb-level trace detection of these illicit substances.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Forensic Science

Background:

  • Illicit synthetic drugs like methamphetamine (MA) pose significant health and security risks.
  • Current on-site detection methods for MA are limited, hindering rapid identification.

Purpose of the Study:

  • To develop novel ratiometric fluorescence probes for sensitive and visible detection of MA and its simulant, methylphenethylamine (MPEA).
  • To establish a smartphone-based system for on-site, quantitative trace detection of MPEA.

Main Methods:

  • Covalent coupling of diphenylacridine (DPA) and dimethylacridine (DMA) with pyridine to create PyDPA and PyDMA probes.
  • Utilizing dual-emission enhancement for unique ratiometric responses.
  • Developing a smartphone-based detection system for quantitative analysis.

Main Results:

  • PyDPA and PyDMA probes exhibited rapid responses with bathochromic shifts over 100 nm.
  • Visible fluorescence color changes from blue to cyan were observed upon exposure to MPEA and MA.
  • The smartphone system achieved on-site trace detection of MPEA at ppb levels.
  • Probes successfully differentiated MPEA from interfering substances via unique ratiometric responses.

Conclusions:

  • The developed PyDPA and PyDMA probes offer a promising solution for on-site, visible, and ratiometric detection of MA and MPEA.
  • The smartphone-based system facilitates rapid, quantitative, and on-site forensic analysis of illicit substances.

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