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Polysiloxane 1 and copolysiloxane 2 consisting of a new spaced phenyl (R)-(2-chloropropoxy)benzoate mesogen were synthesized. The SmA1 structure of 1 and 2 was investigated by X-ray diffraction. This permitted to draw electron density profiles along the smectic layer normal, among which the most physically acceptable one was chosen.
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Galli et al. (1999) studied this question.
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