SI-29 AND AL-27 MAS NMR-STUDY OF THE DISTRIBUTION OF SI AND AL ATOMS IN VARIOUS FORMS OF SYNTHETIC ZEOLITE OMEGA

被引：32
|
作者：
MASSIANI, P [1 ]
FAJULA, F [1 ]
FIGUERAS, F [1 ]
SANZ, J [1 ]
机构：
[1] CSIC,INST CIENCIA MAT,E-28006 MADRID,SPAIN
来源：
ZEOLITES | 1988年 / 8卷 / 04期
关键词：
NUCLEAR MAGNETIC RESONANCE - SPECTROSCOPIC ANALYSIS;
D O I：
10.1016/S0144-2449(88)80132-5
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：
Five samples of zeolite omega have been synthesized under various experimental conditions in order to produce crystals exhibiting different chemical compositions and morphologies. **2**9Si and **2**7Al MAS n. m. r. spectroscopy have been used to determine the Al content of the framework and the Si-Al distributions over the two nonequivalent crystallographic sites. For all samples, a preferential location of the Al atoms in the six-membered rings of the gmelinite columns is observed. Moreover, the Al distribution can change greatly from sample to sample, even for similar overall aluminium contents.
引用
收藏
页码：332 / 337
页数：6
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