Abstract
AbstractA novel liquid crystalline dendrimer with peripheral mesogenic units was successfully prepared. Azo‐reaction and Williamson synthesis were employed in the preparation of the mesogenic unit 4–[4–(6‐hydroxyhexyloxy)‐phenylazo]nitrobenzene (M‐NO2). A terminal SiCl functional carbosilane dendrimer based on pentaerythritol was used as dendritic scaffold and subsequently functionalized with the aforementioned groups. Investigation of the liquid crystalline properties of the mesogen‐functionalized dendrimer PCSi‐1G‐NO2 by polarizing optical microscopy, DSC. and X‐ray diffraction showed that it exhibits smectic E (SE) phase, different from the corresponding mesogenic unit, which shows nematic phase. Furthermore. the temperatures of both the melting point and the clearing point of the mesogen‐functionalized dendrimer decrease, and the temperature region of the SE phase is wider than that of the nematic phase.
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