Design of an Ad Hoc Bifunctional Chiral Ligand for the Preparation of Low-Dimensional Perovskites

We report here the preparation of a novel bifunctional chiral ligand (R) and (S)-1-ammino-2-butanol (AMOL) containing both an amine and hydroxyl group and its use in the preparation of chiral lead iodide perovskites. The incorporation of this bifunctional ligand leads to the synthesis of the [(R-/S-)-AMOL]2PbI3·I samples characterized by an uncommon structural motif composed by 1D double chains running along the crystallographic c-axis built up by face-sharing [PbI6]4- octahedra. Chiroptical properties determination shows and effective chirality transfer from the novel chiral ligands to the inorganic framework with a relevant optical response. The expansion of the library of actually known chiral ligands will not only help the design of novel chiral perovskites but will also provide useful insight into the definition of solid structure-property correlations.