Ashworth, D.J., Cooper, A., Trueman, M. et al. (4 more authors) (2018) Ultrasonic exfoliation of hydrophobic and hydrophilic metal-organic frameworks to form nanosheets. Chemistry. ISSN 0947-6539
Abstract
The modular structure of metal-organic nanosheets (MONs) provides a convenient route to creating two-dimensional materials with readily tunable surface properties. Here we report the liquid exfoliation of two closely related layered metal-organic frameworks functionalised with either methoxy-propyl (1) or pentyl (2) pendent groups intended to bestow either hydrophilic or hydrophobic character to the resulting nanosheets. Exfoliation of the two materials in a range of different solvents highlighted significant differences in their dispersion properties and molecular and nanoscopic structure. Exchange or loss of solvent was found to occur at the labile axial position of the paddle-wheel based MONs and DFT calculations indicated that intramolecular coordination by the oxygen of the methoxy-propyl pendant groups may take place. The nanoscopic dimensions of the MONs were further tuned by varying the exfoliation conditions and through "cascade centrifugation". Aqueous suspensions of the nanosheets were used as sensors to detect aromatic heterocycles and with clear differences in binding behaviour observed and quantified.
Metadata
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Copyright, Publisher and Additional Information: | © 2018 Wiley. This is an author produced version of a paper subsequently published in Chemistry - A European Journal. Uploaded in accordance with the publisher's self-archiving policy. | ||||
Keywords: | Metal-organic framework; nanosheet; liquid exfoliation; two-dimensional materials; sensing | ||||
Dates: |
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Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) | ||||
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Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 04 Oct 2018 09:42 | ||||
Last Modified: | 17 Sep 2019 00:39 | ||||
Published Version: | https://doi.org/10.1002/chem.201803221 | ||||
Status: | Published online | ||||
Publisher: | Wiley | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1002/chem.201803221 | ||||
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