STRUCTURE-DIRECTING EFFECTS IN THE CROWN ETHER-MEDIATED SYNTHESES OF FAU AND EMT ZEOLITES

被引：90

作者：

BURKETT, SL ^{[1
]}

DAVIS, ME ^{[1
]}

机构：

[1] CALTECH, DIV CHEM & CHEM ENGN, PASADENA, CA 91125 USA

来源：

MICROPOROUS MATERIALS | 1993年 / 1卷 / 04期

关键词：

CUBIC FAUJASITE (FAU); HEXAGONAL FAUJASITE (EMT); CROWN ETHER; STRUCTURE DIRECTION; RAMAN SPECTROSCOPY;

D O I：

10.1016/0927-6513(93)80070-B

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The structure-directing effects of 15-crown-5 and 18-crown-6 in the syntheses of cubic faujasite (FAU) and hexagonal faujasite (EMT), respectively, have been investigated. The conformation and distribution of sodium/crown ether complexes during synthesis and in the product materials have been characterized by Raman spectroscopy and by solid-state H-1-C-13 CP NMR. The balance between the structure-directing influences of alkali metal ions and crown ethers on product formation has been investigated. The structural relationships between the two polymorphs of faujasite and the specificity of the crown ether structure-directing agents to these products are discussed in relation to a proposed mechanism of synthesis.

引用

页码：265 / 282

页数：18

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