Unveiling Eco-Friendly Reverse Micelle Systems: Dimethyl Carbonate as a Novel Biocompatible Solvent.

Area of Science:

• Physical Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Reverse micelles (RMs) are crucial in various chemical applications.
• Dimethyl carbonate (DMC) is a biocompatible solvent suitable for RM formulation.
• Understanding RM characteristics is key for optimizing their use.

Purpose of the Study:

• To systematically investigate the properties of DMC/AOT RMs with varying water content.
• To elucidate the role of water in the solvation and interfacial behavior of AOT RMs.
• To determine the critical micellar concentration (CMC) and polarity of the DMC/AOT/water system.

Main Methods:

• Dynamic Light Scattering (DLS) for droplet size analysis.
• Proton Nuclear Magnetic Resonance (¹H NMR) for molecular interactions.
• Molecular probes to assess interfacial properties and system polarity (E_T(30)).

Main Results:

• Increasing water content led to larger RM droplet sizes.
• Water molecules formed hydrogen bonds with DMC, influencing interfacial solvation of AOT.
• A critical micellar concentration of 7×10^-3 M was determined.
• Distinct interfacial properties emerged at higher water concentrations due to hydrogen bonding competition.

Conclusions:

• DMC/AOT RMs can be formed without co-surfactants, leveraging DMC's biocompatibility.
• Water plays a critical role in stabilizing and structuring the RMs.
• This novel micellar system shows promise for catalysis, nanomaterials, and green chemistry.