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Discotic nematic liquid crystals; discotic dimers; multiynes; alkynylbenzene; liquid crystal display

Connecting two columnar phase forming discotic mesogens via a short rigid spacer leads to the formation of a π-conjugated discotic dimer snowing discotic nematic (N_D) phase. Attaching branched-alkyl chains directly to the core in hexaalkynylbenzene resulted in the stabilisation of N_D phase at ambient temperature. Pentalkynylbenzene derivatives possessing a combination of normal- and branched-alkoxy chains display a very broad N_D, phase which is stable well below and above the room temperature.

Sandeep Kumar^{1 2}

1. Centre for Liquid Crystal Research, P.O. Box 1329, Jalahalli, Bangalore - 560 013, India
2. Raman Research Institute, C.V. Raman Avenue, Bangalore - 560 080, India

Published

August 2003