Switchable gate-opening effect in metal-organic polyhedra assemblies through solution processing

Gate-opening gas sorption is known for metal-organic frameworks, and is associated with structural flexibility and advantageous properties for sensing and gas uptake. Here, we show that gate-opening is also possible for metal-organic polyhedra (MOPs), and depends on the molecular organisation in the...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2018-08, Vol.9 (31), p.6463-6469
Main Authors: Craig, Gavin A, Larpent, Patrick, Kusaka, Shinpei, Matsuda, Ryotaro, Kitagawa, Susumu, Furukawa, Shuhei
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemistry
Crystallization
Flexibility
Metal-organic frameworks
Mopping
Polyhedra
Sorption
X ray powder diffraction
X-ray diffraction
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Summary:Gate-opening gas sorption is known for metal-organic frameworks, and is associated with structural flexibility and advantageous properties for sensing and gas uptake. Here, we show that gate-opening is also possible for metal-organic polyhedra (MOPs), and depends on the molecular organisation in the lattice. Thanks to the solubility of MOPs, several interchangeable solvatomorphs of a lantern-type MOP were synthesised treatment with different solvents. One phase obtained through use of methanol induced a gate-opening effect in the lattice in response to carbon dioxide uptake. The sorption process was thoroughly investigated with powder X-ray diffraction and simultaneous adsorption experiments. Meanwhile, solution processing of this flexible phase using THF led to a permanently porous phase without a gate-opening effect. Furthermore, we find that we can change the metallic composition of the MOP, and yet retain flexibility. By showing that gate-opening can be switched on and off depending on the solvent of crystallisation, these findings have implications for the solution-based processing of MOPs.
ISSN:2041-6520
2041-6539
DOI:10.1039/c8sc02263a