| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9594249 | Solid State Nuclear Magnetic Resonance | 2005 | 4 Pages |
Abstract
We present an experimentally feasible triple-resonance NMR method that establishes the correlation among three different nuclei, avoiding the difficulty to directly explore the weak coupling between two NMR nuclei, such as 29Si and 27Al. Using this method, we are able to give an unambiguous assignment to the various peaks in 29Si CP NMR spectrum of MCM-22 zeolite and discriminate 29Si signals from SiOHAl and SiOH groups. In addition, in combination with 1H/27Al double-resonance technique, the 1H/27Al/29Si triple-resonance experiment suggests the presence of two different kinds of Brönsted acid sites in H-MCM-22 zeolite.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
![Unambiguously distinguishing Si[3Si,1Al] and Si[3Si,1OH] stuctural units in zeolite by 1H/29Si/27Al triple resonance solid state NMR spectroscopy](/preview/png/9594249.png "First Page Preview: Unambiguously distinguishing Si[3Si,1Al] and Si[3Si,1OH] stuctural units in zeolite by 1H/29Si/27Al triple resonance solid state NMR spectroscopy")
Authors
Qing Luo, Jun Yang, Wei Hu, Mingjin Zhang, Yong Yue, Chaohui Ye, Feng Deng,