Al-27 multiple quantum MAS NMR study on the distribution of aluminium in the zeolite MCM-22
文献类型：期刊论文
| 作者 | Chen, L; Deng, F; Ye, CH |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 2003-09-01 |
| 卷号 | 19期号:9页码:805-809 |
| 关键词 | MCM-22 distribution of Al NMR MQ MAS quantum chemical calculation |
| 英文摘要 | The distribution of aluminium in the zeolite MCM-22 lattice has been investigated by Al-27 MQ MAS NMR and quantum chemical calculation. Three different aluminium species in tetrahedral coordination were clearly observed in the 2D 5Q MAS NMR spectrum of zeolite MCM-22. From the spectrum, we can calculate the isotropic chemical shifts(delta 50. 5, delta 57. 3, delta 62. 4) and the quadrupolar coupling constant (1. 74, 1. 68, 1. 92 MHz) of the three species. The structure of MCM-22 has the 8 crystallographically distinct T sites. From the simulated Al-27 5Q MAS NMR spectrum, it is evident that 8 T sites can be divided into 3 groups. Sites T2 and T6 correspond to the signals at delta 61, delta 49, respectively; while sites T1, T3, T4, T5, T7, T8 give rise to signal at delta 56. Al is randomly distributed in the framework of MCM-22 zeolite when the Si/Al atom ratio is varied from 10 to 15. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | QUADRUPOLE INTERACTION ; MOLECULAR-SIEVE ; ACID SITES ; SI-29 ; ZSM-5 ; DEALUMINATION ; SPECTROSCOPY ; SUBSTITUTION ; SURFACE ; SPECTRA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000185545200005 |
| 公开日期 | 2015-12-08 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8905]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, L,Deng, F,Ye, CH. Al-27 multiple quantum MAS NMR study on the distribution of aluminium in the zeolite MCM-22[J]. ACTA PHYSICO-CHIMICA SINICA,2003,19(9):805-809. |
| APA | Chen, L,Deng, F,&Ye, CH.(2003).Al-27 multiple quantum MAS NMR study on the distribution of aluminium in the zeolite MCM-22.ACTA PHYSICO-CHIMICA SINICA,19(9),805-809. |
| MLA | Chen, L,et al."Al-27 multiple quantum MAS NMR study on the distribution of aluminium in the zeolite MCM-22".ACTA PHYSICO-CHIMICA SINICA 19.9(2003):805-809. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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