Ligand-switching and counteranion-induced hierarchical self-assembly of silver-NHC complexes

The self-assembly of the rigid, bent, chiral bis(triazol-ylidene) ligands with the linear coordinated group 11 metal centers brought about dramatic architectural variation of metallosupramolecular assemblies from the familiar dinuclear M2L2 to the trinuclear cylindrical foldamers M3L3 through a small variation of the R group of ligand. The foldamers [(S)-2·Ag]3(X)3 further underwent counteranion-triggered hierarchical self-assembly into well-grown nanofibers capable of gelating solvents.

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