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Abylgazina L, Senkovska I, Engemann R, Bönisch N, Gorelik TE, Bachetzky C, Kaiser U, Brunner E, Kaskel S. Chemoselectivity Inversion of Responsive Metal-Organic Frameworks by Particle Size Tuning in the Micrometer Regime. Small 2024:e2307285. [PMID: 38225688 DOI: 10.1002/smll.202307285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/30/2023] [Indexed: 01/17/2024]
Abstract
Gated adsorption is one of the unique physical properties of flexible metal-organic frameworks with high application potential in selective adsorption and sensing of molecules. Despite recent studies that have provided some guidelines in understanding and designing structural flexibility for controlling gate opening by chemical modification of the secondary building units, currently, there is no established strategy to design a flexible MOF showing selective gated adsorption for a specific guest molecule. In a present contribution it is demonstrated for the first time, that the selectivity in the gate opening of a particular compound can be tuned, changed, and even reversed using particle size engineering DUT-8(Zn) ([Zn2 (2,6-ndc)2 (dabco)]n , 2,6-ndc = 2,6-naphthalenedicarboxylate, dabco = 1,4-diazabicyclo-[2.2.2]-octane, DUT = Dresden University of Technology) experiences phase transition from open (op) to closed (cp) pore phase upon removal of solvent from the pores. Microcrystals show selective reopening in the presence of dichloromethane (DCM) over alcohols. Crystal downsizing to micron size unexpectedly reverses the gate opening selectivity, causing DUT-8(Zn) to open its nanosized pores for alcohols but suppressing the responsivity toward DCM.
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Affiliation(s)
- Leila Abylgazina
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Irena Senkovska
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Richard Engemann
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Nadine Bönisch
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Tatiana E Gorelik
- Electron Microscopy Group of Materials Science (EMMS), Central Facility for Electron Microscopy, Universität Ulm, Oberberghof 3/1, 89081, Ulm, Germany
- Department Structure and Function of Proteins, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, Department of Pharmacy, Saarland University, Universitätscampus E8 1, 66123, Saarbrücken, Germany
| | | | - Ute Kaiser
- Electron Microscopy Group of Materials Science (EMMS), Central Facility for Electron Microscopy, Universität Ulm, Oberberghof 3/1, 89081, Ulm, Germany
| | - Eike Brunner
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Stefan Kaskel
- Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
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