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Highly stable fullerene-based porous molecular crystals with open metal sites

Bezzu, C. Grazia, Burt, Luke A., McMonagle, Charlie J., Moggach, Stephen A., Kariuki, Benson M. ORCID:, Allan, David R., Warren, Mark and McKeown, Neil B. 2019. Highly stable fullerene-based porous molecular crystals with open metal sites. Nature Materials 18 , pp. 740-745. 10.1038/s41563-019-0361-0

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The synthesis of conventional porous crystals involves building a framework using reversible chemical bond formation, which can result in hydrolytic instability. In contrast, porous molecular crystals assemble using only weak intermolecular interactions, which generally do not provide the same environmental stability. Here, we report that the simple co-crystallization of a phthalocyanine derivative and a fullerene (C60 or C70) forms porous molecular crystals with environmental stability towards high temperature and hot aqueous base or acid. Moreover, by using diamond anvil cells and synchrotron single-crystal measurements, stability towards extreme pressure (>4 GPa) is demonstrated, with the stabilizing fullerene held between two phthalocyanines and the hold tightening at high pressure. Access to open metal centres within the porous molecular co-crystal is demonstrated by in situ crystallographic analysis of the chemisorption of pyridine, oxygen and carbon monoxide. This suggests strategies for the formation of highly stable and potentially functional porous materials using only weak van der Waals intermolecular interactions.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Nature Publishing Group
ISSN: 1476-1122
Date of First Compliant Deposit: 19 June 2019
Date of Acceptance: 29 March 2019
Last Modified: 05 Nov 2022 07:18

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