Coupling external and internal pressure for the structural transition of MIL-53(Cr)
Flexible metal-organic framework (MOF) materials have the ability to perform stimulated sudden volume contractions, and thus attract increasing attention for use in potential applications such as: actuators or sensors. Here, the structural transition of MIL-53(Cr) loaded with a high concentration of...
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Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2021-11, Vol.5 (44), p.16371-16376 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Flexible metal-organic framework (MOF) materials have the ability to perform stimulated sudden volume contractions, and thus attract increasing attention for use in potential applications such as: actuators or sensors. Here, the structural transition of MIL-53(Cr) loaded with a high concentration of CH
3
OH (CH
3
OH) guest molecules, which cause internal pressure due to guest-guest interactions, was investigated. The pressure triggering the structural transition can be enhanced by high guest molecule loadings (1 CH
3
OH per unit cell (UC): 5 MPa, empty: 53 MPa, 7 CH
3
OH per UC: 90 MPa, and 8 CH
3
OH per UC: 280 MPa). The asymmetrical and small distortion of the organic-inorganic connections are the main microscopic characteristic of the structural transition of MIL-53(Cr) with a high CH
3
OH loading. The external pressure and the internal pressure, instead of the adsorption of the guest molecules, became dominant in the structural transition of MIL-53(Cr). Current studies showed that the high-pressure response of the flexible MOF structure may broaden the acceptable pressure range in future actuator or sensor applications.
We present the coupling external and internal pressure stimuli-induced structure transition of MIL-53 applied as actuator or sensor within broad pressure range. |
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ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/d1dt02538d |