The twisting power of several chiral dopants in two host phase classes is investigated under the viewpoint of its dependence on chain length and size of the headgroups of the surfactants. The results are explained qualitatively, using a simple model of intramicellar chiral induction, which is sensitive to flexibilities and lengths of the surfactant chains. Additional hints for this model are given by the temperature dependence of the pitch. It is shown that p ( T ) of "solid" micelles can be described by a model/formula valid for thermotropic liquid crystals and that deviations become larger if the micelles become more flexible. To interpret the observed temperature dependences, it is speculated that a change of dominance occurs, from sterical chiral interactions to dispersive ones.
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