Guest-responsive thermal expansion in the Zr–porphyrin metal–organic framework PCN-222

Autor: H. L. B. Boström, S. Bette, S. T. Emmerling, M. W. Terban, B. V. Lotsch
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: APL Materials, Vol 10, Iss 7, Pp 071106-071106-6 (2022)
Druh dokumentu: article
ISSN: 2166-532X
DOI: 10.1063/5.0091091
Popis: We use powder x-ray diffraction under variable temperature to study the thermal expansion of the metal–organic framework (MOF) PCN-222. The thermal expansion increases drastically in magnitude following more aggressive heating, which is rationalized by enhanced flexibility upon guest removal. Moreover, the thermal response strongly depends on the temperature: the volumetric expansivity nearly quadruples and the expansion along c changes sign upon cooling. Our results highlight the large flexibility of MOFs and the role of guest species.
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