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In Situ Magnetic Resonance Investigation of Styrene Oxidation over TS-1 Zeolites

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  • Financial support from the National Natural Science Foundation and the Ministry of Science and Technology of the People's Republic of China is gratefully acknowledged. The authors thank Dr. R. Hong and X. Ruan for helpful discussions and K. Perkin for his kind help in composing this paper.

Abstract

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Competing reactions, not consecutive processes, are the oxidation of styrene to styrene epoxide and the formation of phenylacetaldehyde (PADH). In situ NMR and EPR spectroscopic analysis of styrene oxidation on TS-1 zeolite (see picture) demonstrated that Brønsted acid sites provide the active centers needed to transform an intermediate hemiacetal species into PADH.

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