Thermotropic Polymethacrylate Bearing Sulfonylbenzoxazole-Based Multifunctional Photoactive Mesogen

摘要

For the multifunctional liquid crystalline medium with high chromophore content, a thermotropic polymethacrylate (PBBS) bearing monolithic photoactive mesogen was designed and synthesized on the basis of semiempirical quantum calculation. PBBS showed phase transition sequence of I-222 deg C-SmA-169 deg C-SmC-154 deg C-SmX on cooling. Phase transition in the PBBS film could be correlated with the birefringence change and H-aggregate formation monitored as a function of temperature. The multifunctional mesogenic pendent, 2-biphenyl-5-sulfonylbenzoxazole, providing strong blue fluorescence and electroluminescence, large second-order optical nonlinearlity, and intrinsic photoconductivity to the novel photoactive liquid crystalline polymer PBBS.