BONDING STATES OF SURFACE VANADIUM(V) OXIDE PHASES ON SILICA - STRUCTURAL CHARACTERIZATION BY V-51 NMR AND RAMAN-SPECTROSCOPY

被引：278
作者：
DAS, N
ECKERT, H
HU, HC
WACHS, IE
WALZER, JF
FEHER, FJ
机构：
[1] UNIV CALIF SANTA BARBARA, DEPT CHEM, SANTA BARBARA, CA 93106 USA
[2] LEHIGH UNIV, DEPT CHEM, ZETTLEMOYER CTR SURFACE STUDIES, BETHLEHEM, PA 18015 USA
[3] LEHIGH UNIV, DEPT CHEM ENGN, BETHLEHEM, PA 18015 USA
[4] UNIV CALIF IRVINE, DEPT CHEM, BREA, CA 92621 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 31期
关键词：
D O I：
10.1021/j100133a020
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 coordination and local order of vanadium(V) surface oxides on silica are examined by V-51 spin echo and MAS NMR, as well as by Raman spectroscopy. Comparison with corresponding data on two crystallographically characterized model compounds, [Ph3SiO]3VO and [(c-C6H11)7(Si7O12)VO]2, reveals unambiguously that the vanadia species found at the silica surface is a three-legged (SiO)3V=O unit. These results support the hypothesis that silsesquioxanes are appropriate model systems for hydroxylated silica surfaces.
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页码：8240 / 8243
页数：4
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