Multi-Functional Ionic Liquid (IL)-based Sensor Systems for Detection and Monitoring of Volatile Organic Compounds...

Area of Science:

• Materials Science
• Analytical Chemistry
• Chemical Engineering

Background:

• Volatile organic compounds (VOCs) are critical indicators in health, environmental, and industrial monitoring.
• Ionic liquids (ILs) possess unique, tunable properties making them suitable for advanced sensing applications.
• Existing VOC detection methods require improvement in selectivity and sensitivity for complex mixtures.

Purpose of the Study:

• To provide a comprehensive review of ionic liquid (IL)-based sensor platforms for volatile organic compound (VOC) detection.
• To explore the fundamental principles and molecular interactions governing IL-VOC sensing.
• To highlight recent advances and future prospects of ILs in VOC sensing technologies.

Main Methods:

• Review of literature on IL-based sensor platforms (electrochemical, gravimetric, capacitive, chemiresistive).
• Analysis of molecular interactions (hydrogen bonding, π-π stacking, Lewis acid-base) and thermodynamic parameters (Henry's law constants, solvation energies).
• Discussion of IL-functionalized composites, multivariate data analysis, and machine learning in sensor arrays.

Main Results:

• ILs function effectively as sorbents, electrolytes, dielectric materials, and transducers in various sensing modalities.
• Understanding molecular interactions and thermodynamic parameters enhances VOC solubility and selectivity.
• IL-based composites and advanced data analysis improve the detection and discrimination of complex VOC mixtures.

Conclusions:

• Ionic liquids offer versatile and tunable solutions for next-generation VOC sensing.
• IL-based sensors are crucial for targeted detection in clinical, environmental, and industrial applications.
• Continued research in ILs and integrated systems will advance VOC monitoring capabilities.