Issue 2, 2015

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
29 iyl 2014
Accepted
01 okt 2014
First published
02 okt 2014
This article is Open Access
Creative Commons BY license

CrystEngComm, 2015,17, 361-369

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

S. J. Hunt, M. J. Cliffe, J. A. Hill, A. B. Cairns, N. P. Funnell and A. L. Goodwin, CrystEngComm, 2015, 17, 361 DOI: 10.1039/C4CE01572J

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