W-183 NMR-STUDY OF PEROXOTUNGSTATES INVOLVED IN THE DISPROPORTIONATION OF HYDROGEN-PEROXIDE INTO SINGLET OXYGEN (O-1(2), (1)DELTA(G)) CATALYZED BY SODIUM TUNGSTATE IN NEUTRAL AND ALKALINE WATER

Authors
NARDELLO V MARKO J VERMEERSCH G AUBRY JM
Citation
V. Nardello et al., W-183 NMR-STUDY OF PEROXOTUNGSTATES INVOLVED IN THE DISPROPORTIONATION OF HYDROGEN-PEROXIDE INTO SINGLET OXYGEN (O-1(2), (1)DELTA(G)) CATALYZED BY SODIUM TUNGSTATE IN NEUTRAL AND ALKALINE WATER, Inorganic chemistry, 37(21), 1998, pp. 5418-5423
Citations number
23
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Inorganic chemistry → ACNP
ISSN journal
00201669
Volume
37
Issue
21
Year of publication
1998
Pages
5418 - 5423
Database
ISI
SICI code
0020-1669(1998)37:21<5418:WNOPII>2.0.ZU;2-B
Abstract
The disproportionation of aqueous hydrogen peroxide catalyzed by sodiu m tungstate has been investigated with regard to the multiplicity of t he oxygen molecules released. Trapping experiments and detection of th e IR luminescence of O-1(2) have shown that the yield of O-1(2) is vir tually quantitative. The mono-, di-, and tetraperoxotungstate intermed iates W(O-2)(n)O-4-n(2-) (n = 1, 2, 4) have been characterized by UV a nd W-183 NMR spectroscopies. The diperoxo species is proposed as the p recursor of O-1(2).