The luminescent liquid crystals (LLCs) are expected to solve the conflicts between the aggregation caused quenching and the requirement of aggregation or self-organization for LCs. Herein, we developed a new strategy of applying aggregation-induced emission (AIE) phenomenon to the molecular design of LCs towards LLCs. In this report, a calamitic liquid crystal based on tolane with AIE characteristics was successfully synthesized and the chemical structure was characterized by 1H, 13C NMR, and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) high-resolution mass spectra. The fluorescence behavior was studied by fluorescence spectroscopy and the liquid crystal phase behaviors were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM). The crystal structure was obtained by X-ray diffraction crystallography with P1 space group. Results demonstrated that the sample was AIE active and the LC phases sequence during cooling was nematic, smectic C and smectic B phase.
CHEN YaFeiLIN JieShengYUAN WangZhangYU ZhenQiangLAM Jacky WingYipTANG Ben Zhong
5-[（4＇-Heptoxy-4-biphenylyl）carbonyloxy]-1-pentyne（A-3,7） was synthesized and the phase structures and transitions were investigated by differential scanning calorimetry（DSC）,wide angle X-ray diffraction（WAXD）,polarized light microscopy（PLM） and the molecular packing in the crystal and liquid crystalline phases were simulated by molecular dynamic simulation.The results showed that the sample formed thermodynamically metastable SmA and SmC_2 phases before crystallized during cooling and the crystal phase directly transformed into isotropic phase during heating.
Zhen Qiang YuCaiZhenZhuZhe ZhangJian Hong LiuJacky W.Y. LamBen Zhong Tang
The luminescent liquid crystals(LLCs)are expected to solve the conflicts between the aggregation caused quenching and the requirement of aggregation or self-organization for LCs.Herein,we developed a new strategy of applying aggregation-induced emission(AIE)phenomenon to the molecular design of LCs towards LLCs.In this report,a calamitic liquid crystal based on tolane with AIE characteristics was successfully synthesized and the chemical structure was characterized by1H,13C NMR,and matrix-assisted laser desorption/ionization time-of-flight(MALDI-TOF)high-resolution mass spectra.The fluorescence behavior was studied by fluorescence spectroscopy and the liquid crystal phase behaviors were investigated by differential scanning calorimetry(DSC),polarized optical microscopy(POM).The crystal structure was obtained by X-ray diffraction crystallography with P1 space group.Results demonstrated that the sample was AIE active and the LC phases sequence during cooling was nematic,smectic C and smectic B phase.
