Unveiling Morphine: A Rapid and Selective Fluorescence Sensor for Forensic and Medical Analysis

Area of Science:

• Analytical Chemistry
• Chemical Sensing
• Biomedical Science

Background:

• Opioid use, particularly morphine, is associated with severe health issues including CNS disorders and premature mortality.
• Morphine abuse represents a substantial global health challenge and is a critical metabolite of numerous opioids.

Purpose of the Study:

• To develop a highly sensitive and rapid fluorescent sensor for detecting morphine.
• To validate the sensor's efficacy in analyzing various samples, including biological matrices like urine.

Main Methods:

• A novel fluorescent sensor was synthesized via dimerization of 7-methoxy-1-tetralone followed by demethylation.
• The sensor operates on a fluorescence quenching mechanism upon binding with morphine.
• Response surface methodology with a central composite design was employed for optimization.

Main Results:

• The developed sensor exhibits chemo-selective detection of morphine with a linear range of 0.008–40 ppm.
• An impressive limit of detection of 8 ppb was achieved for morphine.
• The sensor successfully quantified trace morphine levels in urine samples with satisfactory analytical outcomes.

Conclusions:

• The developed turn-off fluorescent sensor offers a sensitive, rapid, and selective method for morphine detection.
• This molecular probe has practical applications in monitoring morphine, particularly in forensic and clinical toxicology.
• Optimization using RSM-CCD enhances the reliability of morphine detection in complex biological samples.