Large optical activity has recently been observed in chiral smectic liquid crystalline phases formed from achiral bent-core molecules. The origin of the optical activity remains unclear and has been attributed to both a helical superstructure and the layer chirality produced by simultaneous tilt and polar ordering of bent-core mesogens in the B2 phase. Here, we directly demonstrate that layer chirality produces optical activity in the well ordered SmC(A)P(A) subphase.
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Hough et al. (2007) studied this question.
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