Fluorescence Anion Chemosensor Array Based on Pyrenylboronic Acid.

Area of Science:

• Analytical Chemistry
• Supramolecular Chemistry
• Chemical Sensing

Background:

• Developing selective and sensitive methods for detecting multiple anions in complex matrices remains a significant challenge.
• Existing methods often lack the ability for simultaneous detection or require complex sample preparation.

Purpose of the Study:

• To develop a novel fluorescence chemosensor array for the simultaneous and quantitative detection of multiple anions.
• To utilize pyrenylboronic acid-based probes for anion recognition via fluorescence modulation.

Main Methods:

• Fabrication of a chemosensor array using cross-reactive pyrenylboronic acid derivatives.
• Anion binding studies using fluorescence titrations and electrospray ionization mass spectrometry.
• Pattern recognition algorithms, including linear discriminant analysis and support vector machine, for data analysis.

Main Results:

• The chemosensor array demonstrated fluorescence quenching or enhancement upon anion binding due to photoinduced electron transfer.
• Simultaneous detection of seven anions (fluoride, acetate, oxalate, malonate, citrate, dihydrogen phosphate, and pyrophosphate) with 100% classification accuracy.
• Quantitative prediction of oxalate, malonate, and citrate in mixtures using a support vector machine model.

Conclusions:

• The developed pyrenylboronic acid-based fluorescence chemosensor array offers a robust platform for simultaneous and quantitative multi-anion detection.
• The system's reliance on low-cost, commercially available reagents and pattern recognition techniques paves the way for user-friendly, high-throughput analytical methods.