Anticlinic smectic C phase in new and novel five-ring hockey stick-shaped compounds

作者：Radhika S; Srinivasa H T; Sadashiva K^*

来源：Liquid Crystals, 2011, 38(6): 785-792.

DOI：10.1080/02678292.2011.575958

• hockey stick-shaped compounds
• nematic
• uniaxial smectic A phase
• anticlinic smectic C phase

The synthesis of a new homologous series of novel five-ring compounds composed of hockey stick-shaped molecules derived from 4-hydroxybiphenyl-3-carboxylic acid which exhibit an interesting sequence of phase transitions is presented. Uniaxial nematic and smectic A phases, anticlinic smectic C phase and an unidentified smectic phase at a lower temperature than the latter have been observed. This is perhaps the first example of hockey stick-shaped compounds exhibiting anticlinic smectic C phase directly from the isotropic phase. Polarised light optical microscopy, differential scanning calorimetry, X-ray diffraction measurements and electro-optical switching studies were carried out to identify the mesophases.

• 出版日期2011