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题名: Towards guest-zeolite interactions: An NMR spectroscopic approach
作者: Ma, D;  Han, XW;  Zhou, DH;  Yan, ZM;  Fu, RQ;  Xu, Y;  Bao, XH;  Hu, HB;  Au-Yeung, SCF
关键词: host-guest systems ;  MCM-22 ;  molybdenum ;  NMR spectroscopy ;  zeolites
刊名: CHEMISTRY-A EUROPEAN JOURNAL
发表日期: 2002-10-04
卷: 8, 期:19, 页:4557-4561
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Guest(metal)-zeolite interactions in a two component heterogeneous catalyst have been investigated by high-field and high-speed Al-27 MAS NMR, and two-dimensional Al-27 MQ MAS NMR experiments as well as ab initio DFT methods. It was established that strong interactions between guest and zeolite occur in a metal/zeolite system, with the metal anchored to the tetrahedral aluminum framework site through two oxygen bridges. It disturbs the tetrahedral environment of associated aluminum framework, changing AlO4 geometry from near T-d to C-2v; this enables us to resolve this species from the undisturbed aluminum framework species in high-field Al-27, MAS NMR and two-dimesional Al-27 MQ MAS NMR experiments.
关键词[WOS]: BRONSTED ACIDIC SITES ;  ANGLE-SPINNING NMR ;  STATE ION-EXCHANGE ;  MAS-NMR ;  MOLECULAR-SIEVES ;  AB-INITIO ;  MO/HZSM-5 CATALYSTS ;  AL-27 ;  METHANE ;  ALUMINOPHOSPHATE
语种: 英语
WOS记录号: WOS:000178542000025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139068
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Ctr Interdisciplinary Magnet Resonance, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
3.Chinese Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

Recommended Citation:
Ma, D,Han, XW,Zhou, DH,et al. Towards guest-zeolite interactions: An NMR spectroscopic approach[J]. CHEMISTRY-A EUROPEAN JOURNAL,2002,8(19):4557-4561.
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