Influence of Water on the Chemistry and Structure of the Metal-Organic Framework Cu3(btc)2

Manish P. Singh; Nilesh R. Dhumal; Hyung J. Kim; Johannes Kiefer; James A. Anderson

doi:10.1021/acs.jpcc.6b02906

Influence of Water on the Chemistry and Structure of the Metal-Organic Framework Cu₃(btc)₂

Manish P. Singh, Nilesh R. Dhumal, Hyung J. Kim, Johannes Kiefer, James A. Anderson^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

The structural stability of a Cu-based metal-organic framework (MOF), subject to different conditions including exposure to ambient air and liquid water, was investigated. A detailed characterization of the substrate was performed using FTIR, XRD, SEM, N₂ adsorption, and TGA. Cu₃(btc)₂ was found to be stable after exposure to ambient air for short periods but undergoes irreversible changes during long-term exposure. These changes are not only manifested in terms of structural modifications as determined by XRD and FTIR data but also suggested by an altered morphology as observed by electron microscopy. Slow hydrolysis reactions initially involving a weakening of the metal-ligand bonds are identified as the main mechanism for the irreversible degradation of the Cu₃(btc)₂. The length of exposure and the amount of water were found to be the key parameters that determine the stability of the MOF.

Original language	English
Pages (from-to)	17323-17333
Number of pages	11
Journal	The Journal of Physical Chemistry C
Volume	120
Issue number	31
Early online date	20 Jun 2016
DOIs	https://doi.org/10.1021/acs.jpcc.6b02906
Publication status	Published - 11 Aug 2016

Bibliographical note

ACKNOWLEDGMENTS
This work was supported in part by NSF Grant CHE-1223988
and by EPSRC Grant No. EP/K00090X/1. We thank Dr. J
Duncan (University of Aberdeen) for support involving XRD
measurements.

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title = "Influence of Water on the Chemistry and Structure of the Metal-Organic Framework Cu3(btc)2",

abstract = "The structural stability of a Cu-based metal-organic framework (MOF), subject to different conditions including exposure to ambient air and liquid water, was investigated. A detailed characterization of the substrate was performed using FTIR, XRD, SEM, N2 adsorption, and TGA. Cu3(btc)2 was found to be stable after exposure to ambient air for short periods but undergoes irreversible changes during long-term exposure. These changes are not only manifested in terms of structural modifications as determined by XRD and FTIR data but also suggested by an altered morphology as observed by electron microscopy. Slow hydrolysis reactions initially involving a weakening of the metal-ligand bonds are identified as the main mechanism for the irreversible degradation of the Cu3(btc)2. The length of exposure and the amount of water were found to be the key parameters that determine the stability of the MOF.",

author = "Singh, {Manish P.} and Dhumal, {Nilesh R.} and Kim, {Hyung J.} and Johannes Kiefer and Anderson, {James A.}",

note = "ACKNOWLEDGMENTS This work was supported in part by NSF Grant CHE-1223988 and by EPSRC Grant No. EP/K00090X/1. We thank Dr. J Duncan (University of Aberdeen) for support involving XRD measurements.",

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AU - Singh, Manish P.

AU - Dhumal, Nilesh R.

AU - Kim, Hyung J.

AU - Kiefer, Johannes

AU - Anderson, James A.

N1 - ACKNOWLEDGMENTS This work was supported in part by NSF Grant CHE-1223988 and by EPSRC Grant No. EP/K00090X/1. We thank Dr. J Duncan (University of Aberdeen) for support involving XRD measurements.

PY - 2016/8/11

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N2 - The structural stability of a Cu-based metal-organic framework (MOF), subject to different conditions including exposure to ambient air and liquid water, was investigated. A detailed characterization of the substrate was performed using FTIR, XRD, SEM, N2 adsorption, and TGA. Cu3(btc)2 was found to be stable after exposure to ambient air for short periods but undergoes irreversible changes during long-term exposure. These changes are not only manifested in terms of structural modifications as determined by XRD and FTIR data but also suggested by an altered morphology as observed by electron microscopy. Slow hydrolysis reactions initially involving a weakening of the metal-ligand bonds are identified as the main mechanism for the irreversible degradation of the Cu3(btc)2. The length of exposure and the amount of water were found to be the key parameters that determine the stability of the MOF.

AB - The structural stability of a Cu-based metal-organic framework (MOF), subject to different conditions including exposure to ambient air and liquid water, was investigated. A detailed characterization of the substrate was performed using FTIR, XRD, SEM, N2 adsorption, and TGA. Cu3(btc)2 was found to be stable after exposure to ambient air for short periods but undergoes irreversible changes during long-term exposure. These changes are not only manifested in terms of structural modifications as determined by XRD and FTIR data but also suggested by an altered morphology as observed by electron microscopy. Slow hydrolysis reactions initially involving a weakening of the metal-ligand bonds are identified as the main mechanism for the irreversible degradation of the Cu3(btc)2. The length of exposure and the amount of water were found to be the key parameters that determine the stability of the MOF.

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Influence of Water on the Chemistry and Structure of the Metal-Organic Framework Cu₃(btc)₂

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