Diesters of Pyromellitic Acid – New Amphiphilic Surfactants

The aim of this work was to synthesize new amphiphilic surfactants – diesters of pyromellitic acid (DEPA). Self-assembled amphiphilic oligomers based on dianhydrides are used as nanoreactors and nanocontainers for many practical applications. Synthesized amphiphilic surfactants contain hydrophilic and lipophilic chains and are soluble in both polar and non-polar solvents, what is achieved through solvation of corresponding fragments. The dependence of surface-active properties, including CMC, maximum adsorption in monolayer and the area in adsorption layer occupied by one molecule at the surface interface solution-air from pH was investigated. The presence of carboxyl groups in the molecule of surfactants leads to a significant dependence from pH and negative -potential of micelles. Micelles of amphiphilic DEPA and their aggregates in aqueous solution can serve as nanocontainers and in organic solvents as nanoreactors.