Abstract
AbstractOptical activity measurements in the isotropic liquid phase of cholesteryl oleyl carbonate just above the liquid‐crystal transition pressure were performed for various temperatures up to 200 MPa. The observed optical activity exceeds the molecular activity and can be explained as a pretransitional phenomenon.The maximum value, which the optical activity reaches as the transition to the liquid‐crystal phase is approached, first decreases then increases when clearing temperature and pressure are raised. A theoretical relationship between the pretransitional optical activity and two structural modes is used to interpret this unusual behaviour.
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