An IR spectroscopic study of acid centers on the surface of Al, Zr silica gels

被引：0
|
作者：
Kustov, L. M. [1 ]
Borovkov, V. Yu. [1 ]
Tkachenko, O. P. [1 ]
Bondar', L. A. [2 ]
机构：
[1] Russian Acad Sci, ND Zelinskii Organ Chem Inst, Moscow 119992, Russia
[2] Natl Acad Sci Ukraine, Chuiko Inst Surface Chem, Kiev, Ukraine
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2009年 / 83卷 / 12期
关键词：
ZIRCONIUM;
D O I：
10.1134/S003602440912019X
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：
Acid centers of Al, Zr silica gels with approximately equal aluminum ion contents (similar to 2.4% Al2O3) and various concentrations of Zr ions were studied by IR spectroscopy using the deuteroacetonitrile molecule as a probe. The surface of such samples was found to contain Lewis acid centers of two types, coordination unsaturated (I) silicon and (II) zirconium ions. An increase in the content of zirconium ions was accompanied by a decrease in the intensity of the 2328 cm(-1) band in the IR spectra. This band was characteristic of interaction of CD3CN with Lewis acid centers of type I. The suggestion was made that this was caused by a decrease in the accessibility of coordination unsaturated silicon ions to CD3CN molecules.
引用
收藏
页码：2115 / 2118
页数：4
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