Fig. 1: Synthesis and crystal morphology.

A Reacting AdDB with a cadmium salt under solvothermal reaction conditions resulting in crystals with enantiomorphous morphologies of twisted trapezohedra. The crystals have helicoidal channels. B Bipyramidal crystals: (1) symmetry, (2,3) dissymmetry in size and shape between the top and bottom pyramids. 1-left: Drawing of isohedral habit with {111}. 1-right: Enantiomorph {122} crystal having sharp-zigzagging edges separating top and bottom pyramids. These two forms do not match experimental crystals. 2-left and right: Mirror images of dissymmetric polar bipyramids, where top h ≠ k, and bottom h = k. 3-left: Isometric form \(\{\bar{2}\bar{2}\bar{3}\}\) bisects lower pyramid. 3-right: additional face \(\{\bar{3}\bar{2}\bar{3}\}\) observed in the bottom half of the pyramid resulting in curved pyramidal edges. C The apparent off-set angle between the bottom and top pyramids varied by the use of methanol. D The inclusion and alignment of sodium resorufin in the channels resulted in linear dichroism with the polarization of the dye absorption along the hexagonal axis. E Correlation of dissymmetric forms by equal and opposite measurements of circular retardance (CR) of single crystals.