A Supramolecular-Quantum Dot System for Broad-Spectrum Detection of Fentanyl Analogs

Area of Science:

• Analytical Chemistry
• Materials Science
• Forensic Science

Background:

• Synthetic opioids, particularly fentanyl and its analogs, are driving an epidemic of abuse and overdose deaths in the U.S.
• Existing detection methods lack the sensitivity, portability, and scalability required for effective field applications.
• Detecting trace amounts of fentanyl in complex mixtures and identifying novel analogs presents significant challenges.

Purpose of the Study:

• To develop a convenient, rapid, and reliable sensor for detecting fentanyl and its analogs.
• To address the limitations of current detection methods for public health and safety applications.
• To create a tool capable of identifying a wide range of fentanyl-related compounds.

Main Methods:

• A sensor was engineered utilizing competitive displacement of a fluorescent dye from a supramolecular macrocycle.
• Graphene quantum dots were employed for subsequent fluorescence quenching.
• The sensor was tested for its ability to detect fentanyl and 58 analogs in various mixtures.

Main Results:

• The developed sensor successfully detected and quantified fentanyl and 58 of its analogs, including potent variants like carfentanil.
• Effective detection was achieved at concentrations as low as 0.01 mol%.
• The sensor demonstrated reliable performance even in the presence of common interferents.

Conclusions:

• This supramolecular capture and graphene quantum dot-based sensor offers a simple, rapid, reliable, sensitive, and cost-effective solution for fentanyl detection.
• The sensor has significant potential for advancing public health and safety through field-based detection of fentanyl-class drugs.
• The approach effectively addresses the need for detecting emerging fentanyl analogs and trace amounts in complex samples.