1H NMR Study of Zeolite Water Structure and Broensted Acid Centers in Chabazite

被引：1
|
作者：
Gabuda, S. P. [1 ]
Kolesnikov, A. S. [1 ]
Kozlova, S. G. [1 ]
Lundin, A. G. [2 ]
Moroz, N. K. [1 ]
机构：
[1] AV Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia
[2] Siberian State Technol Univ, Krasnoyarsk, Russia
来源：
APPLIED MAGNETIC RESONANCE | 2011年 / 41卷 / 2-4期
关键词：
HYDRATED CA-CHABAZITE; CRYSTAL-STRUCTURES; PROTON-TRANSFER; FRAMEWORK;
D O I：
10.1007/s00723-011-0279-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The disordered structure of absorbed water in a highly porous zeolite chabazite Ca-2[Al4Si8O24]center dot nH(2)O (2 <= n <= 12.8) is studied from motionally narrowed H-1 nuclear magnetic resonance spectra at room temperature. Concentration phase transitions were observed at n approximate to 8.3 and n approximate to 10.2. The transitions are accompanied by displacement of Ca2+ ions and variation of the Broensted acid centers at inner surface of zeolite pores.
引用
收藏
页码：439 / 447
页数：9
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