Guest-induced formation of an icosahedral coordination cage

Abstract

A coordination cage with an elusive icosahedral geometry was obtained by K+-induced rearrangement of a hexanuclear [(cymene)Ru(pyridine-3,5-dicarboxylate)]6 complex.

Metallo-supramolecular capsules

“…In particular, the authors have shown that a hexanuclear coordination cage, which is obtained from a reaction between [(cymene)Ru(NO 3 ) 2 ] with 3,5-pyridinedicarboxylic acid, can be co-crystallised with KOAc. Upon co-crystallisation, the entire assembly re-arranges into a dodecanuclear coordination cage that has icosahedral geometry [86]. These studies, coupled with those above show the flourishing area of metallo-supramolecular capsules and act as a comparison tool for the following studies that have been carried out in our research group.…”

“…Many of the examples shown above are based on cup or bowl-shaped molecules, but Severin et al recently demonstrated the synthesis of various metal-organic assemblies from organometallic half-sandwich complexes [86,87]. In particular, the authors have shown that a hexanuclear coordination cage, which is obtained from a reaction between [(cymene)Ru(NO 3 ) 2 ] with 3,5-pyridinedicarboxylic acid, can be co-crystallised with KOAc.…”

“…When considering some of the largest supramolecular container assemblies formed to date [16,19,23,[47][48][49][50][68][69][70][84][85][86], hydrogen-bonded pyrogallol- [4]arene capsules (either dimeric or hexameric) are useful for the encapsulation of reasonably large non-solvent molecules, as identified by X-ray diffraction studies [96][97][98][99][100][101][102][103]116,[118][119][120]. From the work reviewed in this article, we have also shown that they are also useful templates for metal-organic analogues [116,[118][119][120][121]124,127].…”

Mixed metal-organic nanocapsules

“…Severin et al reported a neutral half-sandwich metal complex, which was synthesized from the reaction of [(cymene)Ru(NO 3 ) 2 ] with 3,5-pyridinedicarboxylic acid [46,47]. This neutral cage nanocapsule can further act as an exo-receptor for alkali metal ions.…”

Neutral discrete metal–organic cyclic architectures: Opportunities for structural features and properties in confined spaces

“…Synthesis of the hexanuclear cage 209 [304]. A single-crystal X-ray diffraction analysis showed that compound 209 was formed by the association of six (cymene)Ru fragments with six L164 ligands, where each ligand was chelated with three different Ru atoms via the carboxylate O-atoms and pyridine N-atom (Fig.…”