A comprehensive review on PTSA-based deep eutectic solvents

Area of Science:

• Green Chemistry
• Materials Science
• Chemical Engineering

Background:

• Industrial processes face challenges in replacing fossil-based solvents with sustainable alternatives.
• Deep eutectic solvents (DESs) are emerging as promising green solvents due to their tunable properties, cost-effectiveness, and biodegradability.
• p-Toluenesulfonic acid (PTSA) is a strong, stable organic acid suitable as a hydrogen bond donor (HBD) in DES formulations.

Purpose of the Study:

• To explore the diverse applications of PTSA in DESs.
• To highlight the untapped potential of PTSA in sustainable solvent development.
• To provide insights into selecting hydrogen bond acceptors (HBAs) for PTSA-based DESs based on specific applications.

Main Methods:

• Literature review of PTSA's properties and applications in DESs.
• Analysis of HBA selection trends in relation to specific applications and starting materials.
• Discussion of PTSA's role in advancing green chemistry principles.

Main Results:

• PTSA is a versatile HBD for DESs, offering strong acidity and proton availability.
• PTSA-based DESs demonstrate potential in various industrial applications, serving dual roles as solvents and catalysts.
• Specific HBA selection strategies can be developed based on desired DES properties and intended use.

Conclusions:

• PTSA is a valuable component for developing innovative and sustainable DESs.
• The use of PTSA in DESs contributes to reducing industrial waste and enhancing process sustainability.
• Further research into PTSA-based DESs can accelerate the transition towards greener industrial practices.