Cascade energy transfer augmented circular polarization in photofluorochromic cholesteric texture.

Circularly polarized luminescence (CPL)-active light-harvesting systems consisting of a light-responsive donor ( R -1), mediator (Nile red), and terminal acceptor (Cyanine 5) are constructed in cholesteric liquid crystals. A dynamically tunable CPL dissymmetry factor and energy transfer modes, are achieved via the closed-ring and open-ring conversion between R -1-O and R -1-C.