Supramolecular Cu(ii)–dipyridyl frameworks featuring weakly coordinating dodecaborate dianions for selective gas separation†
b
and
Yuanbin
Zhang
*a
Abstract
A new family of weakly coordinating dodecaborate anion hybrid supramolecular Cu(II)–dipyridyl frameworks BSF-n (n = 61, 71, 72, 73, 74, 75) was synthesized and characterized by single crystal analysis. BSF-61 exhibits a 3D porous structure with a planar Cu(II)–dipyridyl network and closo-[B12H11I]2− pillars. In the structures of BSF-71, 72, 73, 74, and 75, the dipyridyl ligand interlinked Cu(II) centers were coordinated with solvent molecules (acetone, MeOH or water) or hydroxyl groups instead of closo-[B12Cl12]2− anions due to their extremely weakly coordinating nature. Bulk synthesis of closo-[B12Cl12]2− hybrid materials under stirring conditions afforded distinct structures. Notably, one material synthesized in MeOH was porous after activation and can be applied for selective C2H2/C2H4 and C2H2/CO2 separations.
- This article is part of the themed collection: Coordination Networks
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