Circular Dichroism of a Chiral Cyanine Dye Dimer Trapped in γ‐Cyclodextrin

Abstract

A description as twisted sandwich fits the dimer of the cyanine dye 1, when two γ-cyclodextrin molecules occupy the central hollow (see sketch on the right). The torque is caused by the chiral interaction between host and guest, which is synergetically magnified by a preferential head-to-head binding of the two halves of the host.