Abstract
The authors have prepared polypyrrole-zeolite systems by oxidative polymerization over small SnO{sub 2} particles and oxygen-covered Pd clusters supported in KL zeolite. The local structure of the Pd and SnO{sub 2} clusters was studied by means of extended X-ray absorption fine structure (EXAFS). Electron spin resonance (ESR) and Fourier transform infrared (FTIR) spectroscopies and solvent extraction techniques were used to characterize the polymeric species in the zeolite cavities. A monomer/oxidant ratio larger than stoichiometric appears to indicate that the oxidation reaction may proceed catalytically after air exposure rather than in a redox fashion.
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