AI Article Synopsis
- Cluster-based spin crossover (SCO) frameworks are innovative metal-organic frameworks (MOFs) that exhibit unique properties and diverse structures.
- The study highlights the synthesis of a specific SCO framework [Fe3{Ag4(CN)6(H2O)}2(TPBA)3](ClO4)2·7DMF (1) featuring a rare topology and a complex network composed of metal clusters and Fe2+ ions.
- Additionally, the research demonstrates effective post-synthetic modifications that allow transformation between different topologies while retaining their spin crossover behaviors, paving the way for advanced smart porous materials.
Article Abstract
Cluster-based spin crossover (SCO) frameworks are a new class of smart metal-organic frameworks (MOFs) with diverse structures and topologies and unique bistable physicochemical properties. Here, we report a cluster-based SCO framework [Fe{Ag(CN)(HO)}(TPBA)](ClO) ⋅ 7DMF (1) with an extremely rare 3,4,6-T108 topology, in which the tripodal [Ag{Ag(CN)}(HO)] clusters axially link the Fe ions to form 2D→3D n-fold Borromean entangled networks. Under the guidance of reticular chemistry, the post-synthetic modification (PSM) from 1 with 3,4,6-T108 topology to [Fe{AgX(CN)}(TPBA)] (2_X, X=Cl, Br, I) with urk topology is firstly achieved via single-crystal to single-crystal (SCSC) transformation. Moreover, the successive SCSC transformations from 2_Cl to 2_Br and then to 2_I are realized for the first time. Their SCO behaviors are also modified by halogen-driven stepwise cluster transformations. Hence, these findings provide new strategies for the development of cluster-based SCO MOFs towards the smart functional porous materials.
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| http://dx.doi.org/10.1002/anie.202414330 | DOI Listing |
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