Mechanical Tunability via Hydrogen Bonding in Metal鈥揙rganic Frameworks with the Perovskite Architecture

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• 作者：Wei Li ; A. Thirumurugan ; Phillip T. Barton ; Zheshuai Lin ; Sebastian Henke ; Hamish H.-M. Yeung ; Michael T. Wharmby ; Erica G. Bithell ; Christopher J. Howard ; Anthony K. Cheetham
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：June 4, 2014
• 年：2014
• 卷：136
• 期：22
• 页码：7801-7804
• 全文大小：300K
• 年卷期：v.136,no.22(June 4, 2014)
• ISSN：1520-5126

文摘

Two analogous metal鈥搊rganic 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鈥檚 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.