PROTON SITES IN KEGGIN HETEROPOLY ACIDS FROM O-17 NMR

Authors
KOZHEVNIKOV IV SINNEMA A VANBEKKUM H
Citation
Iv. Kozhevnikov et al., PROTON SITES IN KEGGIN HETEROPOLY ACIDS FROM O-17 NMR, Catalysis letters, 34(1-2), 1995, pp. 213-221
Citations number
25
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
34
Issue
1-2
Year of publication
1995
Pages
213 - 221
Database
ISI
SICI code
1011-372X(1995)34:1-2<213:PSIKHA>2.0.ZU;2-V
Abstract
The structure of the bulk proton sites in dehydrated solid Keggin-type heteropoly acids (HPA) H3PW12O40 and H4SiW12O40 was determined by O-1 7 NMR. The terminal W=O oxygen atoms in Keggin heteropolyanions were f ound to be the predominant protonation sites. The protonation of HPAs in solution is also discussed on the basis of O-17 NMR data.