NITROXIDE COMPLEXES WITH THE SOLID LEWIS-ACIDS

被引：30
作者：
LUNINA, EV
MARKARYAN, GL
PARENAGO, OO
FIONOV, AV
机构：
[1] Department of Chemistry, Moscow State University, Lenin Hills
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1993年 / 72卷
关键词：
ALUMINA; ESR; LEWIS ACID SITES; NITROXIDE; PARAMAGNETIC PROBE; ZEOLITE;
D O I：
10.1016/0927-7757(93)80483-U
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 possibilities of the paramagnetic probe method for investigating Lewis acid sites (LASs) on the surfaces of oxide catalysts (Al2O3, Al2O3-SiO2, zeolites etc.) are discussed. Nitroxides of different structures were used as paramagnetic probes. The experimental and calculated results have clarified the structure of nitroxide complexes with LASs and have led to an assessment of the impact of steric hindrance on the orientation and mobility of complex-bonded radicals. It has been demonstrated that the method is highly advantageous for the quantitative and qualitative control of surface acidity.
引用
收藏
页码：333 / 343
页数：11
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