Evidence of a Chiral Superstructure in the Discotic Mesophase of an Optically Active Phthalocyanine

In the liquid crystalline phase of optically active phthalocyanine (S)-1 the columns are helically distorted, as has been shown by circular dichroism experiments on a Langmuir-Blodgett film of (S)-1 and by small angle X-ray diffraction studies, and confirmed by time-resolved microwave conductivity measurements.