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Hyperpolarized Xe-129 NMR Spectroscopy Investigation of Metal Cation-Exchanged FAU Zeolites
Xu Shutao1,2; Zhang Weiping1; Han Xiuwen1; Bao Xinhe1
关键词Hyperpolarized Xe-129 Nmr Solid-state Nmr Ion Exchange Fau Zeolite
刊名CHINESE JOURNAL OF CATALYSIS
2009-09-01
30期:9页:945-950
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]NANOSIZED HZSM-5 ZEOLITE ; CU-Y ZEOLITES ; MICROPOROUS STRUCTURE ; XENON ; DESULFURIZATION ; REDUCTION ; ATOMS ; PROBE ; IONS ; NAY
英文摘要Continuous-flow hyperpolarized Xe-129 NMR was used to investigate the influence of metal cation-exchanged faujasite (FAU) zeolites on the Xe-129 chemical shift. Xe-129 is a sensitive probe molecule to detect the local electric field in a confined space originating from substituted metal cations with different electronic structures such as Na+, Ag+, Cu+, Cu2+, and Cs+. It is found that Na+ has less effect on the electric field gradient of the supercage in FAU zeolites. The chemical shifts of Xe in NaX and NaY have similar behavior. For cation with the nd(10) electronic structure such as Ag+ or Cu+, there is specific d(pi)-d(pi) interaction between metal cations and the Xe atom, which leads to the upfield of Xe chemical shift. For Cu2+, its partial paramagnetism results in the broadening of Xe NMR spectra or even disappearance of the Xe-129 signal in the supercage. For Cs+, whose cation has the same electronic structure as the Xe atom, it may adsorb more Xe atoms in the supereage of FAU zeolites, leading to the downfield of Xe chemical shift.
语种英语
WOS记录号WOS:000271079600017
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141461
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Stale Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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Xu Shutao,Zhang Weiping,Han Xiuwen,et al. Hyperpolarized Xe-129 NMR Spectroscopy Investigation of Metal Cation-Exchanged FAU Zeolites[J]. CHINESE JOURNAL OF CATALYSIS,2009,30(9):945-950.
APA Xu Shutao,Zhang Weiping,Han Xiuwen,&Bao Xinhe.(2009).Hyperpolarized Xe-129 NMR Spectroscopy Investigation of Metal Cation-Exchanged FAU Zeolites.CHINESE JOURNAL OF CATALYSIS,30(9),945-950.
MLA Xu Shutao,et al."Hyperpolarized Xe-129 NMR Spectroscopy Investigation of Metal Cation-Exchanged FAU Zeolites".CHINESE JOURNAL OF CATALYSIS 30.9(2009):945-950.
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