Tunneling effect in vitamin E recycling by green tea?
RSC Advances Pub Date: 2016-05-06 DOI: 10.1039/C6RA05986D
Abstract
Recycling reactions of natural vitamin E (α-tocopherol) by catechins contained in green tea were studied with a double-mixing stopped-flow spectrophotometer. The second-order reaction rate constants of the catechins and deuterated analogues were determined by using a simulation, the activation energies were obtained from the temperature dependences, and the deuterium kinetic-isotope effects were examined. From these results, a tunneling effect was found to play an important role in the vitamin E recycling reactions by the catechins, and the structure–activity relationship was clarified. Furthermore, conditions under which the tunneling effect manifests itself in various vitamin E recycling reactions in biological systems and foods were suggested. A new α-tocopherol-recycling capacity assay-method was also proposed, and named an ATREC assay-method after the acronym.
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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