Temperature dependence of adsorption hysteresis in flexible metal organic frameworks
© 2020, The Author(s). “Breathing” and “gating” are striking phenomena exhibited by flexible metal-organic frameworks (MOFs) in which their pore structures transform upon external stimuli. These effects are often associated with eminent steps and hysteresis in sorption isotherms. Despite signifi...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
NATURE RESEARCH
2020
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/IC150100019 http://hdl.handle.net/20.500.11937/82395 |
| _version_ | 1848764500987084800 |
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| author | Rahman, S. Arami-Niya, Arash Yang, X. Xiao, G. Li, G. May, E.F. |
| author_facet | Rahman, S. Arami-Niya, Arash Yang, X. Xiao, G. Li, G. May, E.F. |
| author_sort | Rahman, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2020, The Author(s).
“Breathing” and “gating” are striking phenomena exhibited by flexible metal-organic frameworks (MOFs) in which their pore structures transform upon external stimuli. These effects are often associated with eminent steps and hysteresis in sorption isotherms. Despite significant mechanistic studies, the accurate description of stepped isotherms and hysteresis remains a barrier to the promised applications of flexible MOFs in molecular sieving, storage and sensing. Here, we investigate the temperature dependence of structural transformations in three flexible MOFs and present a new isotherm model to consistently analyse the transition pressures and step widths. The transition pressure reduces exponentially with decreasing temperature as does the degree of hysteresis (c.f. capillary condensation). The MOF structural transition enthalpies range from +6 to +31 kJ·mol−1 revealing that the adsorption-triggered transition is entropically driven. Pressure swing adsorption process simulations based on flexible MOFs that utilise the model reveal how isotherm hysteresis can affect separation performance. |
| first_indexed | 2025-11-14T11:20:21Z |
| format | Journal Article |
| id | curtin-20.500.11937-82395 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:20:21Z |
| publishDate | 2020 |
| publisher | NATURE RESEARCH |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-823952021-03-02T04:22:48Z Temperature dependence of adsorption hysteresis in flexible metal organic frameworks Rahman, S. Arami-Niya, Arash Yang, X. Xiao, G. Li, G. May, E.F. Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry STRUCTURAL TRANSITIONS CO2 STORAGE CH4 THERMODYNAMICS PREDICTION BEHAVIOR ZIF-7 © 2020, The Author(s). “Breathing” and “gating” are striking phenomena exhibited by flexible metal-organic frameworks (MOFs) in which their pore structures transform upon external stimuli. These effects are often associated with eminent steps and hysteresis in sorption isotherms. Despite significant mechanistic studies, the accurate description of stepped isotherms and hysteresis remains a barrier to the promised applications of flexible MOFs in molecular sieving, storage and sensing. Here, we investigate the temperature dependence of structural transformations in three flexible MOFs and present a new isotherm model to consistently analyse the transition pressures and step widths. The transition pressure reduces exponentially with decreasing temperature as does the degree of hysteresis (c.f. capillary condensation). The MOF structural transition enthalpies range from +6 to +31 kJ·mol−1 revealing that the adsorption-triggered transition is entropically driven. Pressure swing adsorption process simulations based on flexible MOFs that utilise the model reveal how isotherm hysteresis can affect separation performance. 2020 Journal Article http://hdl.handle.net/20.500.11937/82395 10.1038/s42004-020-00429-3 English http://purl.org/au-research/grants/arc/IC150100019 http://purl.org/au-research/grants/arc/DP190100983 http://creativecommons.org/licenses/by/4.0/ NATURE RESEARCH fulltext |
| spellingShingle | Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry STRUCTURAL TRANSITIONS CO2 STORAGE CH4 THERMODYNAMICS PREDICTION BEHAVIOR ZIF-7 Rahman, S. Arami-Niya, Arash Yang, X. Xiao, G. Li, G. May, E.F. Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title | Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title_full | Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title_fullStr | Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title_full_unstemmed | Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title_short | Temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| title_sort | temperature dependence of adsorption hysteresis in flexible metal organic frameworks |
| topic | Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry STRUCTURAL TRANSITIONS CO2 STORAGE CH4 THERMODYNAMICS PREDICTION BEHAVIOR ZIF-7 |
| url | http://purl.org/au-research/grants/arc/IC150100019 http://purl.org/au-research/grants/arc/IC150100019 http://hdl.handle.net/20.500.11937/82395 |