Ionic Liquid-Based Surfactants: Recent Advances in Their Syntheses, Solution Properties, and Applications.

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Physical Chemistry

Background:

• Ionic liquids (ILs) exhibit unique properties driving interest in their applications.
• Ionic liquid-based surfactants (ILBSs), including gemini ILBSs, possess tunable hydrophobic tails and heterocyclic head ions.
• ILBSs are crucial for applications involving interfacial adsorption and micelle formation.

Purpose of the Study:

• To review the chemistry and applications of ILBSs and gemini ILBSs (GILBSs) over the past decade.
• To correlate surfactant adsorption and micellar properties with molecular structure, particularly tail length.
• To explore the use of ILBSs in nanoparticle fabrication and polymerization.

Main Methods:

• Compilation and analysis of data for 152 ILBSs and 11 biamphiphilic compounds.
• Correlation of interfacial and micellar properties with molecular structures (e.g., hydrocarbon tail length).
• Review of applications in mesoporous nanoparticle synthesis and microemulsion-templated polymerization.

Main Results:

• ILBSs and GILBSs show diverse adsorption and micelle formation behaviors influenced by structure.
• ILBSs serve as effective templates for mesoporous nanoparticles with controlled porosity and size.
• Stable water/oil and oil/water microemulsions formed by ILs and ILBSs are useful for polymerization.

Conclusions:

• ILBSs and GILBSs demonstrate significant versatility for applications in synthesis, catalysis, polymers, decontamination, and drug delivery.
• Functionalized ILBSs can stabilize polymer nanoparticles formed via microemulsion polymerization.
• Further research into ILBSs and GILBSs promises expanded applications in various scientific fields.