Chiral Ligand-Induced Structural Transformation of Low-Dimensional Hybrid Perovskite for Circularly Polarized Photodetection

Abstract

Chiral organic–inorganic hybrid perovskites (OIHPs) are inversion-asymmetric and have many remarkable properties, including circular dichroism, optical rotation, nonlinear optics, and second-harmonic generation (SHG). Although chiral molecules are responsible for chiroptical properties, they are generally not expected to influence the crystallization of OIHPs. Here, we find that OIHPs synthesized with pristine S- and R-molecules crystallize as 1D perovskites, whereas those synthesized with the racemic molecule crystallized as 2D perovskites. Single crystal X-ray diffraction reveals that the structure change is related to the differing packing of chiral molecules versus racemic ones in OIHPs. Furthermore, we demonstrate that chiral OIHPs containing the S- or R-ligands could be applied in circularly polarized light detectors.

Stable organic lead iodides with three-dimensional crystallographic and electronic structures showing high photoresponse

“…S4†). 40 This indicates promising potential for developing new “step-like” type perovskite optoelectronic devices.…”

Using chiral ammonium cations to modulate the structure of 1D hybrid lead bromide perovskites for linearly polarized broadband light emission at room temperature

“…The formation of a different phase for a racemic mix of the organic large cation molecules was previously reported for other lead halogen perovskites with chiral amino based cations and explained by a different packing of the molecules within the structure. 3,37…”

“…The formation of a different phase for a racemic mix of the organic large cation molecules was previously reported for other lead halogen perovskites with chiral amino based cations and explained by a different packing of the molecules within the structure. 3,37 For the BuA and EBA cations, the corresponding racemic compounds crystallize in centrosymmetric space groups (monoclinic P2 1 /n for (rac)-BuA-PbBr 3 , and orthorhombic Pnma for (rac)-EBA-PbBr 3 ). For both compounds, the PbBr 3 À anionic chains (analog to the ones of the enantiomerically pure compounds, represented in Fig.…”

Metallosupramolecules of Pillar[5]arene with Two Flexible Thiopyridyl Arms: A Heterochiral Cyclic Dimer and Organic Guest-Assisted Homochiral Poly-Pseudo-Rotaxanes

“…In the task-specific metal coordination, chiral ligands have been a hot issue in chiral inversion, chiral self-sorting, asymmetric catalysis, nonlinear optics, magnetism, and ferroelectrics. − On the subject of ligand chirality, pillararenes are also interesting because of their planar chirality [ pS and pR (Figure a)] depending on the rotational barrier. − We have been interested in merging metal-based networking with organic guest threading, because this approach might be promising for improving our understanding of molecular recognition in nature and the construction of rich and varied metallosupramolecules including poly-pseudo-rotaxanes.…”