Fig. 1: Pyridine-tethered oligopeptide ligands and their self-assembled structures on coordination to Ag+. | Nature Communications

Fig. 1: Pyridine-tethered oligopeptide ligands and their self-assembled structures on coordination to Ag+.

From: A metal–peptide capsule by multiple ring threading

Fig. 1

a Peptide ligand 1 with a PGPxGPP sequence (x: imino-(1,3-phenylene)carbonyl spacer) gives [2]catenane 2, which is composed of two Ag1(1)1 macrocycles (crossing number: 2). b Peptide ligand 3 with a PGP sequence forms [4]catenane 4, which contains four Ag3(3)3 macrocycles fully interlocked in tetrahedral manner (crossing number: 12). c Peptide ligand 5 with a PPxAP sequence affords [6]catenane 6, which is composed of six Ag4(5)4 macrocycles multiply interlocked in a cubic manner (crossing number: 24). The peptide regions are drawn as cartoon loops, and the pyridyl and m-phenylene parts in stick representation. Individual macrocycles linked by coordination to Ag+ (white spheres) are colour-coded.

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