Co‐Assembled Supramolecular Nanostructure of Platinum(II) Complex through Helical Ribbon to Helical Tubes with Helical Inversion

We demonstrated the morphology transformation of co‐assemblies based on terpyridine‐based ligands ( 1R and 1S ) possessing R‐ or S‐alanine analogues and their platinum(II) complex ( 2R‐Pt and 2S‐Pt ). The right‐handed helical ribbon of the co‐assembly formed with 0.5 equivalents of 2R‐Pt to 1R was converted into the left‐handed helical ribbon with 0.6 equivalents of 2R‐Pt . The left‐handed helical ribbon structure of the co‐assembly became a tubular structure in the presence of 0.8–1.0 equivalents of 2R‐Pt . The morphology transformation via helical inversion at the supramolecular level was due to an orientation change of the amide groups caused by non‐covalent Pt???Pt interactions between the terpyridine of 2R‐Pt and that of 2R‐Pt . This study provides insights into controlling the morphology of the transformation of helical ribbons into tubular structures through helicity inversion in co‐assembled supramolecular nanostructures based on platinum(II) complexes.