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Borane cage hybrid supramolecular metal-organic frameworks (BSFs): Design, synthesis and gas separation performance
Chengye Lou1, Yu Hu1, Yunjia Jiang*, Lingyao Wang*, Yuanbin Zhang*
https://doi.org/10.1016/j.cjsc.2025.100789
ABSTRACT
Boron cage hybrid supramolecular metal-organic frameworks (BSFs) are a subclass of anion-pillared MOFs (APMOFs). This type of materials are formed through the self-assembly of borane cage anions, metal cations and organic ligands. They possess dense arrays of anionic binding sites within the one-dimensional pores, which can interact selectively with hydrocarbon molecules via B-H···H-C dihydrogen bonds. Therefore, the design of BSFs with appropriate pore properties holds significant potential for achieving highly efficient hydrocarbon separation. However, the current research on BSFs is still in its infancy when compared to other types of APMOFs. Due to the weak coordination ability of borane anions, the directional assembly of BSFs remains challenging. This review article targets to provide an overview of the development history of BSFs, and introduce in detail their design strategies and synthesis methods. In addition, this review will elaborate on the characteristics of BSFs and discuss their gas separation performance. Finally, the current challenges faced by BSFs are summarized, and reasonable suggestions for the future design, development, and industrial application of BSFs are put forward.
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