Electron spin resonance and infrared spectroscopy study of the polyvinylpyrrolidone-C-60 composite

Recently we have found from ESR spectra that the electron charge transfer l ake place in the polyvinylpyrrolidone-C-60 composite. In this paper the pol ystyrene-C-60 polyvinylchloride-C-60, poly(ethylene glycol)-C-60, and poly( ethylene oxide)-C-60 composites are prepared and probed by the ESR techniqu e for comparison. They show no signal which might be referred to the electr on transfer. Along with this, we continue ESR study of the polyvinylpyrroli done-C-60 composite and also present IR spectra, which indicate the involve ment of the carbonyl group of polyvinylpyrrolidone into the electron charge transfer process.