Triarylmethylium-o,o-dimers adopt a twisted geometry so that two diarylmethyliums are stacked in a slipped manner. Thus, chiral auxiliaries on the aryl groups induce a preference in the axial chirality of the central biphenyl unit. Strong circular dichroism is attained through exciton coupling, which can be used for additional spectral output in their electrochromic behavior. Diastereoselectivity based on π–π stacking exhibits unique solvent effects, thus endowing multifunctional response properties.

中文翻译：

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三芳基甲基鎓-o,o-二聚体中强圆二色性的点手性向轴向手性的传递

三芳甲基鎓-o,o-二聚体采用扭曲的几何结构，使两个二芳甲基鎓以滑动方式堆叠。因此，芳基上的手性助剂导致了中心联苯单元的轴向手性的偏好。通过激子耦合获得强圆二色性，可用于在其电致变色行为中提供额外的光谱输出。基于 π-π 堆积的非对映选择性表现出独特的溶剂效应，从而赋予多功能响应特性。