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Tan JC, Civalleri B, Lin CC, et al. Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework. Phys Rev Lett. 2012;108(9):095502doi: 10.1103/PhysRevLett.108.095502.
Tan, J. C., Civalleri, B., Lin, C. C., Valenzano, L., Galvelis, R., Chen, P. F., Bennett, T. D., Mellot-Draznieks, C., Zicovich-Wilson, C. M., & Cheetham, A. K. (2012). Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework. Physical review letters, 108(9), 095502. https://doi.org/10.1103/PhysRevLett.108.095502
Tan, Jin-Chong, et al. "Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework." Physical review letters vol. 108,9 (2012): 095502. doi: https://doi.org/10.1103/PhysRevLett.108.095502
Tan JC, Civalleri B, Lin CC, Valenzano L, Galvelis R, Chen PF, Bennett TD, Mellot-Draznieks C, Zicovich-Wilson CM, Cheetham AK. Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework. Phys Rev Lett. 2012 Mar 02;108(9):095502. doi: 10.1103/PhysRevLett.108.095502. Epub 2012 Feb 29. PMID: 22463647.
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Phys Rev Lett. 2012 Mar 02;108(9):095502. doi: 10.1103/PhysRevLett.108.095502. Epub 2012 Feb 29.

Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework.

Physical review letters

Jin-Chong Tan, Bartolomeo Civalleri, Chung-Cherng Lin, Loredana Valenzano, Raimondas Galvelis, Po-Fei Chen, Thomas D Bennett, Caroline Mellot-Draznieks, Claudio M Zicovich-Wilson, Anthony K Cheetham

Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom.

PMID: 22463647 DOI: 10.1103/PhysRevLett.108.095502

Abstract

Using Brillouin scattering, we measured the single-crystal elastic constants (C(ij)'s) of a prototypical metal-organic framework (MOF): zeolitic imidazolate framework (ZIF)-8 [Zn(2-methylimidazolate)(2)], which adopts a zeolitic sodalite topology and exhibits large porosity. Its C(ij)'s under ambient conditions are (in GPa) C(11)=9.522(7), C(12)=6.865(14), and C(44)=0.967(4). Tensorial analysis of the C(ij)'s reveals the complete picture of the anisotropic elasticity in cubic ZIF-8. We show that ZIF-8 has a remarkably low shear modulus G(min) < or approximately 1 GPa, which is the lowest yet reported for a single-crystalline extended solid. Using ab initio calculations, we demonstrate that ZIF-8's C(ij)'s can be reliably predicted, and its elastic deformation mechanism is linked to the pliant ZnN(4) tetrahedra. Our results shed new light on the role of elastic constants in establishing the structural stability of MOF materials and thus their suitability for practical applications.

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