Abstract
The constrained spaces within zeolites offer unique opportunities for chemical reaction control of very reactive intermediates. Here we review studies which illustrate the use of EPR detection of paramagnetic species following radiolysis of guest molecules in zeolites to gain new insights into reactions of organic radical cations. The radiolysis/EPR technique is also a valuable method to study catalytic transformations on acidic zeolites. In essence, radiolysis is used to spin label products of catalysis in order that they may be detected and identified by EPR. Several examples are presented to show that application at low temperatures makes the radiolysis/EPR method a promising new in situ spectroscopy for elucidating mechanisms in zeolite catalysis.
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