RATE-LIMITING ONE-ELECTRON TRANSFER IN THE OXIDATION OF NADH BY POLYOXOMETALATES

Authors
KEITA B ESSAADI K NADJO L DESMADRIL M
Citation
B. Keita et al., RATE-LIMITING ONE-ELECTRON TRANSFER IN THE OXIDATION OF NADH BY POLYOXOMETALATES, Chemical physics letters, 237(5-6), 1995, pp. 411-418
Citations number
34
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
237
Issue
5-6
Year of publication
1995
Pages
411 - 418
Database
ISI
SICI code
0009-2614(1995)237:5-6<411:ROTITO>2.0.ZU;2-Y
Abstract
The kinetics of NADH oxidation by 3 Dawson-type mixed heteropolyanions were studied in buffered aqueous pH = 7 medium, by the stopped flow t echnique and UV-visible spectroscopy. The log of k was a linear functi on of the E(0) 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 init ial rate-limiting one-electron transfer. An estimate of the E(0) value for the one-electron NADH/NADH(+.) couple has been obtained.