Pressure-Induced Bond Rearrangement and Reversible Phase Transformation in a Metal-Organic Framework

Spencer, Elinor C and Kiran, Mangalampalli SRN and Li, Wei and Ramamurty, Upadrasta and Ross, Nancy L and Cheetham, Anthony K (2014) Pressure-Induced Bond Rearrangement and Reversible Phase Transformation in a Metal-Organic Framework. In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 53 (22). pp. 5583-5586.

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Abstract

Pressure-induced phase transformations (PIPTs) occur in a wide range of materials. In general, the bonding characteristics, before and after the PIPT, remain invariant in most materials, and the bond rearrangement is usually irreversible due to the strain induced under pressure. A reversible PIPT associated with a substantial bond rearrangement has been found in a metal-organic framework material, namely tmenH(2)]Er(HCOO)(4)](2) (tmenH(2)(2+) = N,N,N',N'-tetramethylethylenediammonium). The transition is first-order and is accompanied by a unit cell volume change of about 10%. High-pressure single-crystal X-ray diffraction studies reveal the complex bond rearrangement through the transition. The reversible nature of the transition is confirmed by means of independent nanoindentation measurements on single crystals.

Item Type:	Journal Article
Publication:	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Publisher:	WILEY-V C H VERLAG GMBH
Additional Information:	Copyright for this article belongs to the WILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
Keywords:	bond rearrangement; high-pressure X-ray diffraction; metal-organic frameworks; nanoindentation; pressure-induced phase transformations
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	25 Jul 2014 10:22
Last Modified:	25 Jul 2014 10:22
URI:	http://eprints.iisc.ac.in/id/eprint/49441

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