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题名: Probing the porosity of cocrystallized MCM-49/ZSM-35 zeolites by hyperpolarized Xe-129 NMR
作者: Liu, Yong1;  Zhang, Weiping1;  Xie, Sujuan1;  Xu, Longya1;  Han, Xiuwen1;  Bao, Xinhe1
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2008-01-31
DOI: 10.1021/jp077396m
卷: 112, 期:4, 页:1226-1231
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: One- and two-dimensional Xe-129 NMR spectroscopy has been employed to study the porosity of cocrystallized MCM-49/ZSM-35 zeolites under the continuous flow of hyperpolarized xenon gas. It is found by variable-temperature experiments that Xe atoms can be adsorbed in different domains of MCM-49/ZSM-35 cocrystallized zeolites and the mechanically mixed counterparts: The exchange of Xe atoms in different types of pores is very fast at ambient temperatures. Even at very low temperature two-dimensional exchange spectra (EXSY) show that Xe atoms still undergo much faster exchange between MCM-49 and ZSM-35 analogues in the cocrystallized zeolites than in the mechanical mixture. This demonstrates that the MCM-49 and ZSM-35 analogues in cocrystallized zeolites may be stacked much closer than in the physical mixture, and some parts of intergrowth may be formed due to the partially similar basic structure of MCM-49 and ZSM-35.
关键词[WOS]: LASER-POLARIZED XE-129 ;  INTERGROWTH ZEOLITES ;  MAGNETIC-RESONANCE ;  XENON ;  SPECTROSCOPY ;  EXCHANGE ;  SURFACE ;  ENHANCEMENT ;  CATALYSTS ;  MCM-22
语种: 英语
WOS记录号: WOS:000252619000025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141178
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

Recommended Citation:
Liu, Yong,Zhang, Weiping,Xie, Sujuan,et al. Probing the porosity of cocrystallized MCM-49/ZSM-35 zeolites by hyperpolarized Xe-129 NMR[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(4):1226-1231.
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