In hybrid metal halide perovskites, chiroptical properties typically arise from structural symmetry breaking by incorporating a chiral A-site organic cation within the structure, which may limit the compositional space. Here we demonstrate highly efficient remote chirality transfer where chirality is imposed on an otherwise achiral hybrid metal halide semiconductor by a proximal chiral molecule that is not interspersed as part of the structure yet leads to large circular dichroism dissymmetry factors (g_CD) of up to 10⁻². Density functional theory calculations reveal that the transfer of stereochemical information from the chiral proximal molecule to the inorganic framework is mediated by selective interaction with divalent metal cations. Anchoring of the chiral molecule induces a centro-asymmetric distortion, which is discernible up to four inorganic layers into the metal halide lattice. This concept is broadly applicable to low-dimensional hybrid metal halides with various dimensionalities (1D and 2D) allowing independent control of the composition and degree of chirality.

在杂化金属卤化物钙钛矿中，手性通常是由于在结构中掺入手性 A 位有机阳离子而打破结构对称性而产生的，这可能会限制组成空间。在这里，我们展示了高效的远程手性转移，其中手性由近端手性分子施加在其他非性杂化金属卤化物半导体上，该分子不作为结构的一部分穿插，但导致高达 ^10-2 的大圆二色性不对称因子 （g_CD）。密度泛函理论计算表明，立体化学信息从手性近端分子到无机框架的转移是通过与二价金属阳离子的选择性相互作用介导的。手性分子的锚定会引起中心不对称畸变，在金属卤化物晶格中可辨别多达四个无机层。这一概念广泛适用于各种维度（1D 和 2D）的低维杂化金属卤化物，允许独立控制手性的组成和程度。