Symmetry Breaking Induced by Chiral Phosphonic Acids in a 2D Tin-Halide Perovskite.

ABSTRACT: The ability to induce and modulate chirality in metal halide perovskite semiconductors (MHPs) using chiral additives expands the compositional design space and offers a means of tuning chiroptical properties. Motivated by the ability of phosphonic acids to interact with metal ions, we designed three chiral phosphonic acids (CPAs) to impose chirality in otherwise achiral 2D MHP, phenylammonium tin iodide (PA₂SnI₄). We found that both the position of the phosphonic acid relative to the bond between the two naphthalene rings (i.e., the chiral axis) and the distance between the phosphonic acid and the binaphthyl chiral units significantly impact the transfer of structural chirality into the MHP lattice. The compound with a phosphonic acid directly bound to one of the naph

SUBMITTER: Taddei M 

PROVIDER: S-EPMC12512100 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature