Metal-driven assembly of peptidic foldamers: formation of molecular tapes

Abstract

In this article, we report the use of a peptidic foldamer in the synthesis of supramolecular metal–organic structures. A peptidic ligand was designed and synthesised to adopt a canonical 3₁₀ helix with pyridyl ligands at each end, as confirmed by X-ray diffraction analysis. The combination of the synthesised peptide and silver salts under adequate reaction conditions results in the production of coordination polymers. The materials thus produced have been analysed by means of SEM-EDS, confirming the formation of long, regular, tape-shaped fibres that contain both the organic moiety and the metal atom. ATR FT-IR spectroscopy suggests that the helical structure of the peptide is preserved within the fibre.