Three molecular combinations, each consisting of two disk-shaped (tripheny-lene units) and one rod-shaped mesogen (azobenzene- and azobophenyl-units) were synthesized with the aim of generating new liquid crystal phases. Two molecular geometries were realized thereby. The trimesogen 1 with laterally fixed rod-like mesogen (“Wheel of Mainz”) crystallizes unexpectedly well, while another trimesogen with terminally fixed rod-like mesogen leads to a novel liquid-crystal phase.
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Kreuder et al. (1987) studied this question.
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