Behavior of poly-N-vinylpyrrolidone-fullerene C60 composites in aqueous solutions

Water-soluble compounds composed of fullerene and poly(N-vinylpyrrolidone) or polyacrylamide were prepared by solid-phase interaction in the presence of KBr. The UV spectroscopic study of solutions of these composites showed a smaller fraction of aggregated fullerene in the polyvinylpyrrolidone-KBr-fullerene C-60 product compared to the polyvinylpyrrolidone-fullerene C-60 composite. As follows from the variation in the reciprocal intensity of scattered light with concentration, fullerene affects the structure of aqueous solutions of fullerene-containing polymers. This effect is inherent in solutions of both samples prepared in the solid phase and in polyvinylpyrrolidone-fullerene C-60 complexes synthesized in organic solvents.