Amphiphilic Esters of Pyromellitic Acid: Synthesis and Prospects of Applications

This review focuses on amphiphilic diesters and "gemini" surfactants synthesized from pyromellitic acid, polyethylene glycols, aliphatic alcohols, and cholesterol. The discussion encompasses their unique colloidal and chemical properties, with an emphasis on the relationship between critical micelle concentration and hydrophilic-lipophilic balance. Structural factors, particularly the length of the lipophilic substituents, significantly influence CMC values in aqueous systems. Additionally, the presence of carboxyl groups in the pyromellitic acid core allows for pH-dependent modulation of surface activity. The amphiphiles exhibit exceptional potential in forming micellar structures capable of solubilizing hydrophobic substances, including dyes, oils, cholesterol, and the bioactive compound curcumin. Beyond enhancing the stability of these substances, they enable controlled release mechanisms that mimic cellular membrane interactions. Such versatility positions the materials from amphiphilic diesters of pyromellitic acid as promising candidates for innovative applications in targeted drug delivery systems and as nanoreactors for synthesizing silver nanoparticles. This review underscores their potential in advancing nanotechnology and biomedical engineering.