Cation effectsX on the voltammetric behavior of alpha-Keggin-type [SiMo12O40](4-) and [PMo12O40](3-) complexes in CH3COCH3 and CH3CN

Citation
S. Himeno et al., Cation effectsX on the voltammetric behavior of alpha-Keggin-type [SiMo12O40](4-) and [PMo12O40](3-) complexes in CH3COCH3 and CH3CN, J ELEC CHEM, 485(1), 2000, pp. 49-54
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN journal
1572-6657 → ACNP
Volume
485
Issue
1
Year of publication
2000
Pages
49 - 54
Database
ISI
SICI code
Abstract
The effect of small cations such as H+, Li+ and Na+ on the voltammetric beh avior of alpha-Keggin-type [SiMo12O40](4-) and [PMo12O40](3-) complexes was investigated in CH3COCH3 and CH3CN. For the [SiMo12O40](4-) complex, the p resence of Li+ or Na+ caused the one-electron waves to be converted into a two-electron wave at ca. 0.3 V more positive than the first one-electron wa ve. In the presence of Li+ or Na+, the [PMo12O40](3-) complex underwent a t wo-electron reduction at the same potential as the original first one-elect ron wave in CH3COCH3, whereas it exhibited only successive one-electron wav es in CH3CN. The addition of a trace amount of H+ produced new two-electron waves at more positive potentials. These findings give a clue to the under standing of the reactivity of polyoxometalates as redox catalysts. (C) 2000 Elsevier Science S.A. All rights reserved.