Highly ordered smectic structures of disc–rod luminescent liquid crystals: the role of the tolane group

Abstract

Two novel calamitic tolane luminogen modified triphenylene-based discotic luminescent liquid-crystals (LLC) are rationally designed and synthesized to investigate the self-assembly competition between triphenylene discogens and tolane calamitic mesogens. Results show...

Cyanostilbene‐Based AIEgen Smart Film: Optical Switching by Engineering Molecular Packing Structure and Molecular Conformation Through Thermal and Photoinduced Monotropic Phase Transition

“…The other strong diffraction at 2θ = 21.24° (d = 0.42 nm) comes from the long-range hexagonal packing of cyanostilbene mesogens (Figure S9, Supporting Information). [49][50][51][52] Therefore, it is realized that the first thermal transition at 48 °C is the phase transition from SmCr to the highly ordered SmB LC phase. As the temperature rises further, the lateral molecular packing becomes weaker.…”

“…Based on the experimental results, the second thermal transition is considered as a phase transition from the highly ordered SmB LC phase to the lowordered SmA LC phase. [49][50][51][52][53][54] Above the third thermal transition temperature, the sharp diffraction peak in the low-angle region completely disappears and amorphous scattering halos are only exhibited, indicating a phase transition from the SmA LC phase to the Iso phase. The investigated monotropic phase transition behavior of D4CS is summarized in Figure 2d and Figure S10 (Supporting Information).…”

Photoelectric and Self-Assembly Properties of Tetrasubstituted Pyrene Discotic Derivatives

“…As one of the important categories of expanding π-conjugated organic materials, discotic liquid crystal materials have attracted more and more attention owing to their excellent self-assembly and self-healing properties [ 8 , 9 , 10 ]. Besides, with the deepening of research, discotic organic liquid crystal has potential low cost and its unique properties can be customized by chemical reaction design [ 11 , 12 ], which gives it broad development prospects.…”