Understanding structural distortions in hybrid layered perovskites with the n = 1 Ruddlesden-Popper structure.

ABSTRACT: A symmetry mode analysis yields 47 symmetrically distinct patterns of octahedral tilting in hybrid organic-inorganic layered perovskites that adopt the n = 1 Ruddlesden-Popper (RP) structure. The crystal structures of compounds belonging to this family are compared with the predictions of the symmetry analysis. Approximately 88% of the 140 unique structures have symmetries that agree with those expected based on octahedral tilting alone, while the remaining compounds have additional structural features that further lower the symmetry, such as asymmetric packing of bulky organic cations, distortions of metal-centered octahedra or a shift of the inorganic layers that deviates from the a/2 + b/2 shift associated with the RP structure. The structures of real compounds are heterogeneously distr

SUBMITTER: Liu T 

PROVIDER: S-EPMC10324490 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature