Adsorption-Desorption Induced Structural Changes of Cu-MOF Evidenced by Solid State NMR and EPR Spectroscopy

被引：66

作者：

Jiang, Yijiao ^{[1
]}

Huang, Jun ^{[2
]}

Kasumaj, Besnik ^{[1
]}

Jeschke, Gunnar ^{[1
]}

Hunger, Michael ^{[2
]}

Mallat, Tamas ^{[1
]}

Baiker, Alfons ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Chem & Appl Biosci, HCI, CH-8093 Zurich, Switzerland

[2] Univ Stuttgart, Inst Chem Technol, D-70550 Stuttgart, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 06期

关键词：

METAL-ORGANIC FRAMEWORK; CRYSTAL-STRUCTURE; CLATHRATE-FORMATION; HYDROGEN; COMPLEXES;

D O I：

10.1021/ja8088718

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Adsorption-desorption induced structural changes of Cu(bpy)(H2O)(2)(BF4),(bpy) (bpy = 4,4'-bipyridine) [Cu-MOF] have been evidenced by combined NMR and EPR spectroscopy. Upon adsorption of probe molecules even at a few mbar, EPR spectra show that they are activated to form complexes at Cu(II) sites, which results in a change of the Cu-MOF's structure as indicated by a high-field shift of the B-11 MAS NMR. After desorption, both EPR and B-11 MAS NMR spectra evidenced that the structure of the Cu-MOF reversibly shifted to the original state. This observation indicates that MOFs can undergo structural changes during processes where adsorption-desorption steps are involved such as gas storage, separation, and catalysis.

引用

页码：2058 / +

页数：3

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