SI-29 MAS NMR-SPECTROSCOPY OF TECTOZINCOSILICATES

被引：45

作者：

CAMBLOR, MA ^{[1
]}

DAVIS, ME ^{[1
]}

机构：

[1] CALTECH,PASADENA,CA 91125

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 50期

关键词：

D O I：

10.1021/j100101a010

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：

Si-29 MAS NMR spectroscopic data from dense (Na2ZnSiO4, Na(2)ZnSi2O6, K2ZnSi4O10) and microporous (VPI-7, VPI-9) tectozincosilicates are presented. These results allow for the first time the assignment of the chemical shift ranges for silicon environments (Si:nSi,4-nZn; n = 0-4) in tectozincosilicates. A comparison between the chemical shift ranges of tectozincosilicates and tectoaluminosilicates (zeolites) is provided, and the differences are rationalized in terms of the Zn-O-Si bonding. Unlike aluminosilicates, a high degree of Zn, Si ordering is observed in all the materials investigated. Predictions of structural details for the tectozincosilicates VPI-7 and VPI-9 are made, and several general aspects of the crystal chemistry of tectozincosilicates are discussed in view of the NMR data.

引用

页码：13151 / 13156

页数：6

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