Diastereomeric triamines containing two helicene moieties, 1, 12-dimethylbenzo [c] phenanthrene, were synthesized and found to form folded structures in the water. Such folding was not observed for an achiral compound possessing a naphthalene moiety. The (M, M)-dihelicenetriamine with matching configuration at the helicene moieties formed a more stable folded structure than the (P, M)-isomer containing two enantiomeric helicene ...