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Biocompatible β-cyclodextrin-based metal-organic frameworks
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DOI：10.3389/fchem.2025.1682298.png)
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Abstract
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β-Cyclodextrin (β-CD) is a cyclic heptasaccharide; part of the family of molecules which are widely used in several biological applications. The unique cone-shape of cyclodextrins with multiple binding sites make them a well-suited building block for constructing porous crystalline solids; such as metal-organic frameworks (MOFs). However; owing to the symmetry constraints; progress in the coordination chemistry of β-CD with alkali and alkaline earth metal cations has been limited and there is less understanding of this chemistry compared to its analogues of α-CD and γ-CD. In this work; synthetic conditions were optimised to obtain two MOF structures with β-CD as the organic linker; one each with Na+ and K+ cations. As well as structural determination; detailed solid-state characterization is reported for both the MOFs. The structure analysis helps shed light on the binding tendencies of β-CD and these structures will further facilitate the deployment of biocompatible building blocks for the development of reticular solid materials.
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