Proton Sites in Keggin Heteropoly Acids from 17O NMR
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Catalysis Letters
ISSN: 1011-372X
, E-ISSN: 1572-879X
|
| Output data |
Year: 1995,
Volume: 34,
Number: 1-2,
Pages: 213-221
Pages count
: 9
DOI:
10.1007/BF00808336
|
| Tags |
17O MAS and solution NMR, determination of proton sites, tungsten heteropoly acids |
| Authors |
Kozhevnikov I.V.
1
,
Sinnema A.
2
,
van Bekkum H.
2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia
|
| 2 |
Laboratory of Organic Chemistry and Catalysis, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
|
|
The structure of the bulk proton sites in dehydrated solid Keggin-type heteropoly acids (HPA) H3PW12O40 and H4SiW12O40 was determined by 17O NMR. The terminal W=O oxygen atoms in Keggin heteropolyanions were found to be the predominant protonation sites. The protonation of HP As in solution is also discussed on the basis of 17O NMR data.