Application of 119Sn CPMG MAS NMR for Fast Characterization of Sn Sites in Zeolites with Natural 119Sn Isotope Abundance

被引：45

作者：

Kolyagin, Yury G. ^{[1
,2
]}

Yakimov, Alexander V. ^{[1
]}

Tolborg, Soren ^{[3
,4
]}

Vennestrom, Peter N. R. ^{[3
]}

Ivanova, Irina I. ^{[1
,2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Leninskie Gory 1, Moscow 119991, Russia

[2] RAS, AV Topchiev Inst Petrochem Synth, Leninskiy Prospect 29, Moscow 119992, Russia

[3] Haldor Topsoe Res Labs, Haldor Topsoes Alle 1, DK-2800 Lyngby, Denmark

[4] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2016年 / 7卷 / 07期

基金：

俄罗斯科学基金会;

关键词：

BAEYER-VILLIGER OXIDATIONS; MEERWEIN-PONNDORF-VERLEY; LEWIS-ACID CATALYSTS; BETA-ZEOLITE; SOLID-STATE; GLUCOSE ISOMERIZATION; MOLECULAR-SIEVES; ACTIVE-SITES; MFI; EPIMERIZATION;

D O I：

10.1021/acs.jpclett.6b00249

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sn-119 CPMG MAS NMR is demonstrated to be a fast and efficient method for characterization of Sn-sites in Sn-containing zeolites. Tuning of the CPMG echo-train sequence decreases the experimental time by a factor of 5-40 in the case of as-synthesized and hydrated Sn-BEA samples and by 3 orders of magnitude in the case of dehydrated Sn-BEA samples as compared to conventional methods. In the latter case, the reconstruction of the quantitative spectrum without the loss of sensitivity is shown to be possible. The method proposed allows obtaining Sn-119 MAS NMR spectra with improved resolution for Sn-BEA zeolites with natural Sn-119 isotope abundance using conventional MAS NMR equipment.

引用

页码：1249 / 1253

页数：5

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