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

Bostrom, H. L. B.; Bette, S.; Emmerling, S. T.; Terban, M. W. and Lotsch, B. V. (2022): Guest-responsive thermal expansion in the Zr-porphyrin metal-organic framework PCN-222. In: APL Materials, Vol. 10, No. 7, 71106

Abstract

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. (C) 2022 Author(s).

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• ISSN: 2166-532X
• Language: English
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390776260