Complementary Helicity Interchange of Optically Switchable Supramolecular-Enantiomeric Helicenes with (-)-Gel-Sol-(+)-Gel Transition Ternary Logic

摘要

A gallamide-containing pseudoenantio-meric helicene pair bearing a (10R,11R)-dimethoxymethyl-dibenzosuberane core can self-assemble by intermolecular amide H-bonding and π-π stacking into bundled helical fibers with helical tunnels of complementary helicity in CH_2Cl_2. The helicenes undergo excellent complementary photoswitchings of ternary logic at 280, 318, and 343 nm through (-)-gel-sol-(+)-gel interconversion.