✦ LIBER ✦

Rate-limiting one-electron transfer in the oxidation of NADH by polyoxometalates

✍ Scribed by Bineta Keita; Khalid Essaadi; Louis Nadjo; Michel Desmadril

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 452 KB
Volume: 237
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00331-w

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✦ Synopsis

The kinetics of NADH oxidation by 3 Dawson-type mixed heteropolyanions were studied in buffered aqueous pH = 7 medium, by the stopped flow technique and UV-visible spectroscopy. The log of k was a linear function of the E ° of the first redox systems of the heteropolyanions with a slope of 16.5 V-1 The results indicate that, in the present case, the oxidation of NADH proceeds by a multistep mechanism involving initial rate-limiting one-electron transfer. An estimate of the E ° value for the one-electron NADH/NADH +" couple has been obtained.

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