Journal
DALTON TRANSACTIONS
Volume 52, Issue 19, Pages 6239-6243Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3dt00912b
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We synthesized a new tripyridine dipyrrolide pincer ligand and used it to prepare a subnanometric chiral silver cluster. The cluster exhibited a double-stranded helicate structure. Interestingly, through hierarchical intercluster interactions, the cluster helicates evolved into complex secondary structures resembling protein secondary structures.
We designed and synthesized a new tripyridine dipyrrolide pincer ligand, which could be doubly deprotonated to provide five-nitrogen-donor sites and then utilized to prepare a subnanometric chiral silver cluster. The cluster belongs to an S-4 point group and shows a double-stranded helicate. DFT calculations were performed to analyze the electronic structure of the cluster. Interestingly, through hierarchical intercluster interactions, the cluster helicates evolve into complex secondary structures including a right-handed helix and a folded sheet, both of which are reminiscent of secondary structures of proteins, i.e., an alpha-helix and an antiparallel beta-sheet.
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