29Si MAS NMR Spectroscopy of Tectozincosilicates
29Si MAS NMR Spectroscopy of Tectozincosilicates
复制标题
Tectozincosilicates 的 29Si MAS NMR 光谱
DOI：
10.1021/j100101a010
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Mark E. Davis
中科院分区：
文献类型：
--
作者：
M. A. Camblor;Mark E. Davis
给出了致密（Na_2 ZnSi_4、Na_2 ZnSi_2 O_6、K_2 ZnSi_4 O_10）和微孔（VPI-7、VPI-9）结构锌硅酸盐的~（29）Si MAS NMR光谱数据。这些结果首次给出了构造锌硅酸盐中硅环境（Si：nSi，4-nZn; n= 0-4）的化学位移范围。比较tectozincosilicates和tectoaluminosilicates（沸石）之间的化学位移范围，并合理化的Zn-O-Si键的差异。与铝硅酸盐不同，在所有研究的材料中观察到高度的Zn，Si有序。预测的tectozincosilicates VPI-7和VPI-9的结构细节，和tectozincosilicates的晶体化学的几个一般方面进行了讨论，鉴于NMR数据。
29Si MAS NMR spectroscopic data from dense (Na2ZnSiC> 4, Na2ZnSi2C> 6, K2ZnSÍ40io) and microporous (VPI-7, VPI-9) tectozincosilicates are presented. These results allow for the first time the assignment of the chemical shift ranges for siliconenvironments (Si: nSi, 4—nZn; n= 0—4) in tectozincosilicates. A comparisonbetween 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.