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Breathing Metal-Organic Framework Based on Flexible Inorganic Building Units
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. (Nanotechnology and Functional Materials)ORCID iD: 0000-0002-4072-4324
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2020 (English)In: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 20, no 1, p. 320-329Article in journal (Refereed) Published
Abstract [en]

Five novel bismuth carboxylate coordination polymers were synthesized from biphenyl-3,4′,5-tricarboxylic acid (H3BPT) and [1,1′:4′,1′′]terphenyl-3,3′′,5,5′′-tetracarboxylic acid (H4TPTC). One of the phases, [Bi(BPT)]·2MeOH (denoted SU-100, as synthesized), is the first example, to the best of our knowledge, of a reversibly flexible bismuth-based metal–organic framework. The material exhibits continuous changes to its unit cell parameters and pore shape depending on the solvent it is immersed in and the dryness of the sample. Typically, in breathing carboxylate-based MOFs, flexibility occurs through tilting of the organic linkers without significantly altering the coordination environment around the cation. In contrast to this, the continuous breathing mechanism in SU-100 involves significant changes to bond angles within the Bi2O12 inorganic building unit (IBU). The flexibility of the IBU of SU-100 reflects the nondiscrete coordination geometry of the bismuth cation. A disproportionate increase in the solvent accessible void volume was observed when compared to the expansion of the unit cell volume of SU-100. Additionally, activated SU-100 (SU-100-HT) exhibits a large increase in unit cell volume, yet has the smallest void volume of all the studied samples.

Place, publisher, year, edition, pages
2020. Vol. 20, no 1, p. 320-329
National Category
Materials Chemistry
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-400206DOI: 10.1021/acs.cgd.9b01266ISI: 000506088200038OAI: oai:DiVA.org:uu-400206DiVA, id: diva2:1380536
Funder
Swedish Foundation for Strategic Research Knut and Alice Wallenberg Foundation, 2016.0072Swedish Research Council Formas, 2018-00651ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 19-549Swedish Research Council, 2017-04321Knut and Alice Wallenberg Foundation, 2012.0112Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2020-02-26Bibliographically approved

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