The “smectic D ” mesophase has been described in the past as a cubic arrangement of rods. In the present work, a molecular model, in which rods are formed by the stacking of small groups of molecules lying side by side, is proposed. The junction of the rods occurs through a cholestericlike twist of the molecules. A possible connection between this structure and that of the blue phases is suggested.
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Guillon et al. (1987) studied this question.
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