Evidence for random parallel and anti-parallel packing between neighbouring cholesteryl 4-(2-anthryloxy)butyrate (CAB) molecules in the cholesteric liquid-crystalline phase. Identification of the four photodimers fromCAB

Abstract

The packing arrangements of cholesteryl 4-(2-anthryloxy)butyrate (CAB) have been investigated in its cholesteric liquid-crystalline, neat isotropic, and solution isotropic phases by analysing the distributions of photodimers obtained from each. The four photodimers of CAB have been identified unambiguously. Their distribution indicates that neighbouring pairs of CAB in the liquid-crystalline phase experience orientations that are parallel and anti-parallel with about equal probability.