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Engineering new defective phases of UiO family metal-organic frameworks with water

Firth, FCN; Cliffe, MJ; Vulpe, D; Aragones-Anglada, M; Moghadam, PZ; Fairen-Jimenez, D; Slater, B; (2019) Engineering new defective phases of UiO family metal-organic frameworks with water. Journal of Materials Chemistry A , 7 (13) pp. 7459-7469. 10.1039/c8ta10682g. Green open access

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Abstract

As defects significantly affect the properties of metal–organic frameworks (MOFs)—from changing their mechanical properties to enhancing their catalytic ability—obtaining synthetic control over defects is essential to tuning the effects on the properties of the MOF. Previous work has shown that synthesis temperature and the identity and concentration of modulating acid are critical factors in determining the nature and distribution of defects in the UiO family of MOFs. In this paper we demonstrate that the amount of water in the reaction mixture in the synthesis of UiO family MOFs is an equally important factor, as it controls the phase which forms for both UiO-67(Hf) and UiO-66(Hf) (F4BDC). We use this new understanding of the importance of water to develop a new route to the stable defect-ordered hcp UiO-66(Hf) phase, demonstrating the effectiveness of this method of defect-engineering in the rational design of MOFs. The insights provided by this investigation open up the possibility of harnessing defects to produce new phases and dimensionalities of other MOFs, including nanosheets, for a variety of applications such as MOF-based membranes.

Type: Article
Title: Engineering new defective phases of UiO family metal-organic frameworks with water
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c8ta10682g
Publisher version: https://doi.org/10.1039/C8TA10682G
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10074038
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