C-13 NMR spectroscopy of methane adsorbed in SAPO-11 molecular sieve

被引：15

作者：

Koskela, T ^{[1
]}

Ylihautala, M ^{[1
]}

Vaara, J ^{[1
]}

Jokisaari, J ^{[1
]}

机构：

[1] OULU UNIV,DEPT PHYS SCI,NMR RES GRP,FIN-90571 OULU,FINLAND

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 261卷 / 4-5期

基金：

芬兰科学院;

关键词：

D O I：

10.1016/0009-2614(96)00996-7

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：

Static C-13 and C-13-{H-1} NMR spectra of carbon-13 enriched methane ((CH4)-C-13) adsorbed into SAPO-11 molecular sieve were recorded at variable temperatures. Moreover, the corresponding MAS NMR spectra were measured. These experiments reveal a temperature-dependent, anisotropic and asymmetric C-13 nuclear shielding tenser. Ab initio model calculations of methane in the field of a positive point charge suggest that the deformation of the shielding tensor may be related to the interaction between the methane molecule and the charge-compensating protons. A comparison with existing Xe data is made.

引用

页码：425 / 430

页数：6

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