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Mechanical Tunability via Hydrogen Bonding in Metal-Organic Frameworks with the Perovskite Architecture

DOI: 10.1021/ja500618z DOI Help

Authors: Wei Li (University of Cambridge, U.K.) , A. Thirumurugan (School of Chemistry, Indian Institute of Science Education and Research (IISER-TVM),) , Phillip T. Barton (University of California, USA.) , Zheshuai Lin (Beijing Center of Crystal R&D, China) , Sebastian Henke (University of Cambridge, U.K.) , Hamish Yeung (NIMS) , Michael Wharmby (Diamond Light Source) , Erica G. Bithell (University of Cambridge, U.K.) , Christopher J. Howard (University of Newcastle, U.K.) , Anthony K. Cheetham (University of Cambridge, U.K.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society , VOL 136 (22) , PAGES 7801 - 7804

State: Published (Approved)
Published: June 2014
Diamond Proposal Number(s): 8580

Abstract: Two analogous metal organic frameworks (MOFs) with the perovskite architecture, [C(NH2)3][Mn(HCOO)3] (1) and [(CH2)3NH2][Mn(HCOO)3] (2), exhibit significantly different mechanical properties. The marked difference is attributed to their distinct modes of hydrogen bonding between the A-site amine cation and the anionic framework. The stronger cross-linking hydrogen bonding in 1 gives rise to Young's moduli and hardnesses that are up to twice those in 2, while the thermal expansion is substantially smaller. This study presents clear evidence that the mechanical properties of MOF materials can be substantially tuned via hydrogen-bonding interactions.

Subject Areas: Materials, Chemistry


Instruments: I19-Small Molecule Single Crystal Diffraction