We synthesized liquid crystalline 2-phenylbenzothiazole derivatives and investigatedtheir charge carrier transport properties by time-of-flight experiments. Thesematerials show less ordered phases such as smectic A, smectic C, and nematicphases at temperature range lower than 100C, and their mobility was relativelysmall, from 10^-5 cm2/Vs to 10^-4cm2/Vs. In addition, the mobility depends ontemperature, while it did not depend on electric fields. According to these results,we estimated the eneregy distribution of density of states responsible for condition,s of Gaussian width, to be 78-118 meV.
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