Flexibility transition and guest-driven reconstruction in a ferroelastic metal–organic framework

Hunt, S.J., Cliffe, M.J., Hill, J.A. ORCID: 0000-0002-8442-3857, Cairns, A.B., Funnell, N.P. and Goodwin, A.L., 2015. Flexibility transition and guest-driven reconstruction in a ferroelastic metal–organic framework. CrystEngComm, 17 (2), pp. 361-369.

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Abstract

The metal–organic framework copper(I) tricyanomethanide, Cu(tcm), undergoes a ferroelastic transition on cooling below Tf = 240 K. Thermal expansion measurements reveal an order-of-magnitude variation in framework flexibility across Tf. The low-temperature phase α-Cu(tcm) exhibits colossal positive and negative thermal expansion that is the strongest ever reported for a framework material. On exposure to acetonitrile, Cu(tcm) undergoes a reconstructive solid-phase transition to acetonitrilocopper(I) tricyanomethanide. This transition can be reversed by heating under vacuum. Infrared spectroscopy measurements are sensitive to the phase change, suggesting that Cu(tcm) may find application in solid-phase acetonitrile sensing.

Item Type: Journal article
Publication Title: CrystEngComm
Creators: Hunt, S.J., Cliffe, M.J., Hill, J.A., Cairns, A.B., Funnell, N.P. and Goodwin, A.L.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
Volume: 17
Number: 2
Identifiers:
NumberType
10.1039/c4ce01572jDOI
1465540Other
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 15 Feb 2022 12:04
Last Modified: 15 Feb 2022 12:04
URI: http://irep.ntu.ac.uk/id/eprint/45670

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