Assessing negative thermal expansion in mesoporous metal-organic frameworks by molecular simulation
Evans JD, Duerholt JP, Kaskel S, Schmid R (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 7
Pages Range: 24019-24026
Journal Issue: 41
DOI: 10.1039/c9ta06644f
Abstract
Most conventional materials display expansion in response to heating, so there is considerable interest in identifying materials that display the opposite behavior, negative thermal expansion (NTE). The current study investigated the temperature-induced contraction of seven mesoporous metal-organic frameworks (MOFs) of varying topology and composition, which exhibit outstanding porosity, using molecular simulation. We found exceptional NTE for the most porous MOFs, as well as a correlation between the coefficient of NTE and porosity. The large molecular subunits of the MOFs were further studied to find they intrinsically display NTE, corresponding to terahertz vibrational modes. As a result, NTE has a considerable effect on the mechanical properties of these MOFs and is an important consideration for understanding the mechanical stability of new extremely porous materials.
Involved external institutions
Germany (DE)How to cite
APA:
Evans, J.D., Duerholt, J.P., Kaskel, S., & Schmid, R. (2019). Assessing negative thermal expansion in mesoporous metal-organic frameworks by molecular simulation. Journal of Materials Chemistry A, 7(41), 24019-24026. https://doi.org/10.1039/c9ta06644f
MLA:
Evans, Jack D., et al. "Assessing negative thermal expansion in mesoporous metal-organic frameworks by molecular simulation." Journal of Materials Chemistry A 7.41 (2019): 24019-24026.
BibTeX: Download