New shells for magnetic nanoparticles based on polypyrrole functionalized with α-amino acids

Abstract

New functionalized magnetic core-shell nanostructures were developed based on magnetite as magnetic core covered with pyrrole copolymers substituted by α-amino acids. The 3-substituted pyrrole monomers were synthesized by amide formation between an α-amino acid and 4-(1-phenylsulfonyl-(1H- pyrrol-3-yl)-4-oxo-butyric acid. Further, these substituted pyrrole monomers were copolymerized with unsubstituted pyrrole by oxidation with ammonium persulfate in the presence of water based magnetic nanofluids yielding functionalized magnetic core-shell nanostructures. The morphology of these magnetic functionalized polypyrrole core-shell nanoparticles was investigated by TEM and HRTEM, while the molecular structures and magnetic properties were investigated by FTIR spectroscopy and magnetization measurements, respectively. ©ARKAT-USA, Inc.