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

页码：439 / 447

页数：9

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