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

页码：332 / 337

页数：6

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