AI Article Synopsis
- Stimuli-responsive metal-organic frameworks (MOFs) can change their structure and gas adsorption properties when exposed to external factors like temperature.
- A specific MOF, identified as ·[CuCl], can switch from a rigid to a flexible phase due to a temperature change, altering its gas adsorption behavior significantly.
- This structural change is driven by a new mechanism that modifies the coordination and geometry of copper ions within the framework, allowing the MOF to express its inherent flexibility.
Article Abstract
Stimuli-responsive metal-organic frameworks (MOFs) exhibit dynamic, and typically reversible, structural changes upon exposure to external stimuli. This process often induces drastic changes in their adsorption properties. Herein, we present a stimuli-responsive MOF, ·[CuCl], that shows temperature dependent switching from a rigid to flexible phase. This conversion is associated with a dramatic reversible change in the gas adsorption properties, from Type-I to S-shaped isotherms. The structural transition is facilitated by a novel mechanism that involves both a change in coordination number (3 to 2) and geometry (trigonal planar to linear) of the post-synthetically added Cu(i) ion. This process serves to 'unlock' the framework rigidity imposed by metal chelation of the bis-pyrazolyl groups and realises the intrinsic flexibility of the organic link.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8597854 | PMC |
| http://dx.doi.org/10.1039/d1sc04712d | DOI Listing |
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