A one-pot fluorogenic cascade cyclization reaction via BF₃-sensing.

Area of Science:

• Analytical Chemistry
• Materials Science
• Chemical Sensing

Background:

• Boron Trifluoride (BF3) is a toxic gas requiring sensitive detection methods.
• Chemodosimetric sensors offer selective and visual detection capabilities.
• Development of portable and rapid sensing technologies is crucial for environmental and industrial safety.

Purpose of the Study:

• To develop and characterize a novel chemodosimetric sensor for toxic Boron Trifluoride (BF3).
• To investigate the sensing mechanism and performance of the sensor.
• To evaluate the sensor's potential for portable, naked-eye detection of BF3 gas.

Main Methods:

• Synthesis and characterization of (E)-3-Phenyl-1-(2-(phenylethynyl) phenyl) prop-2-en-1-one as a chemodosimetric sensor.
• Electronic spectral analysis to study the interaction with BF3.
• NMR titration and ESI-MS techniques to elucidate the binding mechanism.
• Fluorescence intensity measurements to quantify sensitivity and detection limits.

Main Results:

• The sensor selectively detected BF3 gas, observable with the naked eye.
• A significant 60-fold increase in fluorescence intensity was observed in under 2 minutes.
• An extremely low detection limit of 6.36 × 10-10 M was achieved.
• The binding mechanism was proposed based on spectroscopic and mass spectrometry data.

Conclusions:

• The developed chemodosimetric sensor is highly effective for detecting toxic BF3 gas.
• The sensor exhibits rapid response, exceptional sensitivity, and portability.
• This technology holds promise for real-time monitoring and safety applications.