C60-containing polymer complexes: Complexation between multifunctional 1-(4-methyl)piperazinyl-fullerene or N-[(2-piperidyl)ethyl]aminofullerene and proton-donating polymers

Abstract

Multifunctional 1-(4-methyl)piperazinylfullerene (MPF) and N-[(2-piperidyl)ethyl]aminofullerene (PEAF) were prepared by nucleophilic addition of C60 with amines. MPF and PEAF formed complexes with poly(styrenesulfonic acid) (PSSA), poly(vinylphosphonic acid) (PVPA), poly(acrylic acid) (PAA) or poly(methacrylic acid) (PMA), resulting in fullerene-containing polymer complexes. All the complexes showed no distinct glass transitions up to the degradation temperatures. The PSSA complexes showed unusual thermal behavior. The interactions between the C60 derivatives and the polymers were studied by X-ray photoelectron spectroscopy (XPS). XPS shows that the nitrogen atoms in both MPF and PEAF are protonated by the polymers. The strong ionic interactions between the C60 derivatives and the proton-donating polymers led to the formation of complexes. © Wiley-VCU Verlag GmbH, 2000.