Water interactions in metal organic frameworks
Metal organic frameworks (MOFs) have a strong potential for gas adsorption and separation such as H 2 and CH 4 storage, and CO 2 capture. However, their instability in the presence of water vapor (many MOFs are hygroscopic) is one of the key issues that limit their large-scale application. Previous...
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| Published in | CrystEngComm Vol. 17; no. 2; pp. 247 - 26 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.01.2015
|
| Subjects | |
| Online Access | Get full text |
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| Summary: | Metal organic frameworks (MOFs) have a strong potential for gas adsorption and separation such as H
2
and CH
4
storage, and CO
2
capture. However, their instability in the presence of water vapor (many MOFs are hygroscopic) is one of the key issues that limit their large-scale application. Previous studies of water adsorption in MOFs have mainly relied on isotherm measurements that provide useful parameters such as adsorption uptake and isosteric heat of adsorption. The structural stability of MOFs in water vapor was also evaluated by powder X-ray diffraction measurements (PXRD). However, more studies are required to unravel the water interaction or reaction mechanisms within MOFs, which would be beneficial for the development of more robust frameworks. This review highlight focuses on water adsorption in two representative MOFs: M(bdc)(ted)
0.5
[M = Cu
2+
, Zn
2+
, Ni
2+
, Co
2+
; bdc = 1,4-benzenedicarboxylate; ted = triethylenediamine] with saturated metal centers and MOF-74 [M
2
(dobdc), M = Mg
2+
, Zn
2+
, Ni
2+
, Co
2+
and dobdc = 2,5-dihydroxybenzenedicarboxylic acid] with unsaturated metal centers. It shows how vibrational spectroscopy combined with van der Waals density functional (vdW-DF) calculations makes it possible to elucidate the details of water reaction in MOFs. The results presented in this highlight suggest that the reactivity and initial decomposition pathway of MOFs in water vapor critically depend on their structure and the specific metal cation in the building units. Water interaction with a hydrophobic MOF, in this case FMOF-1, is also reviewed. This information provides a framework for understanding water interactions or reactions within different types of MOFs.
Insight into the structural variation of metal organic framework materials upon hydration. |
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| Bibliography: | NO 2 NO), and the interaction and competitive adsorption of different gases within MOFs. Currently he is a post-doctoral fellow, continuing his work on gas diffusion and co-adsorption in MOF materials. Yves J Chabal currently holds the Texas Instrument Distinguished Chair in Nanoelectronics at UT Dallas and is a Professor of Materials Science and Engineering. He obtained a B.A. in Physics from Princeton University in 1974 and a Ph.D. in Physics from Cornell University in 1980. After 22 years at Bell Labs, where he studied the fundamental processes at semiconductor surfaces and interfaces, he joined Rutgers University in 2003 and UT Dallas in 2008, where he initiated collaborative work on metal organic framework materials. His current research is centered on surface chemical functionalization of semiconductor and oxide surfaces, atomic layer deposition, quantum dot-enhanced silicon photovoltaic cells, energetic nanolaminates, and hybrid materials such as MOFs. Kui Tan received his bachelor's degree in chemistry of materials from Nankai University in 2008. He joined Prof. Yves Chabal's group at UT Dallas in the fall of 2008 to continue his doctoral education in materials science and engineering. His Ph.D. research work was based on spectroscopic techniques (mainly infrared absorption) to study the stability of metal organic framework (MOF) materials in the presence of water vapor and other corrosive gases SO e.g. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1466-8033 1466-8033 |
| DOI: | 10.1039/c4ce01406e |