A self-assembled Pd₂L₄ cage that selectively encapsulates nitrate
2015
Zhou, Li-Peng | Sun, Qing-Fu
A M₂L₄ cage with D₄ symmetry was self-assembled from four anthracene-bridged benzimidazole ligands and two Pdᴵᴵ ions. The cage features a concise hydrophobic pocket wrapped up by the anthracene walls with eight hydrogen-bond donors pointing inward, which provide a specific binding site for nitrate, with a binding affinity at least two orders of magnitude higher than all the other anions screened including halide anions, which have a very similar ionic radius and charge density.
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