Journal
CHEMICAL SCIENCE
Volume 5, Issue 6, Pages 2297-2303Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4sc00462k
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Funding
- NSF
- NIBIB [T21 EB004822]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
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The synthesis of a two-dimensional (2D) metal-organic framework (MOF) is described wherein Zn-seamed pyrogallol[4] arene (PgC(x)) nanocapsules are utilized as supramolecular building blocks with 4,4'-bipyridine (bpy) linkers. The choice of linker and of crystallization solvent (DMSO) was guided by electronic structure calculations on the zinc model complexes Zn(C2H3O2)(2)L, which showed that bpy and DMSO have similar Zn-L binding strengths and that there is little drop-off in binding strength when bpy is bound to a second Zn(C2H3O2)(2) moiety. The MOF features unusual coordination geometries at the zinc centres along the nanocapsular periphery when compared to previous examples of zinc-seamed nanocapsules. The change in coordination geometry leads to a compulsory change in the internal volume of the nanocapsule as well as the behaviour of the encapsulated guest molecule. There are also several well defined voids and channels within the structure.
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