PROTON SITES IN KEGGIN HETEROPOLY ACIDS FROM O-17 NMR

被引：61

作者：

KOZHEVNIKOV, IV ^{[1
]}

SINNEMA, A ^{[1
]}

VANBEKKUM, H ^{[1
]}

机构：

[1] BORESKOV INST CATALYSIS,NOVOSIBIRSK 630090,RUSSIA

来源：

CATALYSIS LETTERS | 1995年 / 34卷 / 1-2期

关键词：

TUNGSTEN HETEROPOLY ACIDS; DETERMINATION OF PROTON SITES; O-17 MAS AND SOLUTION NMR;

D O I：

10.1007/BF00808336

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of the bulk proton sites in dehydrated solid Keggin-type heteropoly acids (HPA) H3PW12O40 and H4SiW12O40 was determined by O-17 NMR. The terminal W=O oxygen atoms in Keggin heteropolyanions were found to be the predominant protonation sites. The protonation of HPAs in solution is also discussed on the basis of O-17 NMR data.

引用

收藏

页码：213 / 221

页数：9

相关论文

共 25 条

[1] DODECATUNGSTOPHOSPHORIC ACID HEXAHYDRATE, (H5O2+)3(PW12O403-) - TRUE STRUCTURE OF KEGGINS PENTAHYDRATE FROM SINGLE-CRYSTAL X-RAY AND NEUTRON-DIFFRACTION DATA [J].

BROWN, GM ;

NOESPIRLET, MR ;

BUSING, WR ;

LEVY, HA .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1977, 33 (APR15) :1038-1046

[2] O-17 NUCLEAR MAGNETIC-RESONANCE SPECTROSCOPY OF POLYOXOMETALATES .1. SENSITIVITY AND RESOLUTION [J].

FILOWITZ, M ;

HO, RKC ;

KLEMPERER, WG ;

SHUM, W .

INORGANIC CHEMISTRY, 1979, 18 (01) :93-103

[3]

Fyfe C. A., 1983, SOLID STATE NMR CHEM, P284

[4]

Izumi Y, 1992, ZEOLITE CLAY HETEROP, P99

[5]

JANSEN RJJ, 1994, RECL TRAV CHIM PAY B, V113, P115

[6]

KAZANSKII LP, 1977, DOKL AKAD NAUK SSSR+, V234, P1376

[7]

KAZANSKII LP, 1977, DOKL AKAD NAUK SSSR+, V233, P152

[8] The structure and formula of 12-phosphotungstic acid. [J].

Keggin, JF .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1934, 144 (A851) :0075-0100

[9] CHARGE-DISTRIBUTION IN LARGE POLYOXO-ANIONS - DETERMINATION OF PROTONATION SITES IN V10O286- BY O-17 NUCLEAR MAGNETIC-RESONANCE [J].

KLEMPERER, WG ;

SHUM, W .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (10) :3544-3545

[10] ISOMERISM AND CHARGE-DISTRIBUTION IN MIXED-METAL POLYOXOANION CLUSTERS - O-17 NUCLEAR MAGNETIC-RESONANCE STRUCTURE DETERMINATIONS OF CIS-V2W4O194- AND CIS-HV2W4O193- [J].

KLEMPERER, WG ;

SHUM, W .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1978, 100 (15) :4891-4893