Tristriazolotriazines with Π-Conjugated Segments: Star-shaped Fluorophors and Discotic Liquid Crystals

摘要

C_3-symmetrical tristriazolotriazines substituted with phenylene rings carrying lateral flexible alkoxy side chains were prepared via condensation/ring transformation of cyanuric chloride and tetrazoles. These star-shaped, planar compounds can form broad thermotropic mesophases. Due to the extensive π-conjugation, these compounds are highly emissive and the octupolar donor-acceptor electronic structure results in non-linear optical properties like solvatochromism. Br?nstedt acids provoke halochromism of the absorption and of the fluorescence.