Cyclodextrin-based architectures for electrochemical sensing: from molecular recognition to functional hybrids

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Cyclodextrins (CDs) possess unique host-guest properties for molecular recognition.
• Electrochemical sensors require high selectivity and sensitivity for accurate analyte detection.

Purpose of the Study:

• To review recent advances in integrating cyclodextrins with various materials for electrochemical sensing.
• To highlight the application of CD-based electrochemical sensors in environmental, pharmaceutical, and clinical analyses.

Main Methods:

• Functionalizing electrode surfaces with cyclodextrins using methods like self-assembled monolayers and polymer entrapment.
• Combining cyclodextrin-modified electrodes with nanomaterials (e.g., carbon nanotubes, graphene) and redox mediators.
• Employing diverse electrochemical detection techniques such as voltammetry and impedance spectroscopy.

Main Results:

• Achieved improved selectivity and lower detection limits for various analytes through CD integration.
• Demonstrated synergistic effects from hybrid materials enhancing conductivity, catalysis, and signal amplification.
• Showcased reversible recognition capabilities for repeated sensor use and continuous monitoring.

Conclusions:

• CD-based electrochemical sensors offer promising solutions for sensitive, portable, and cost-effective chemical analysis.
• Integration with advanced materials and biological receptors enhances sensor performance and expands applicability.
• Ongoing innovations address challenges in reproducibility and real-world robustness for widespread adoption.