The development of low-dimensional perovskite micro/nanostructures with high water stability for novel photonic/electronic applications is highly desirable. Herein, one-dimensional (1D) organic–inorganic hybrid perovskite micro-belts [(AD)Pb₂Cl₅] (OIHP-AD, AD = acridine) were facilely synthesized through fast precipitation in aqueous solution at room temperature without any organic solvent and expensive alkyl halide. Luminescent properties and water stability are efficiently enhanced due to the highly regular arrangement of the protonated AD dyes with larger steric hindrance distributed in the perovskite host–guest system, which can afford denser crystal packing to prevent water erosion. The OIHP-AD micro-belts present upconversion fluorescence, polarized photoemission and optical waveguide performances with a low loss coefficient (0.004 dB μm⁻¹) during propagation, thus extending the applications of 1D perovskite micro/nanostructures to potential optical communication micro-devices.

A stable luminescent MOF, constructed from a novel Eu ₂ Na cluster and tricarboxylate, has been synthesized into a cubic framework and demonstrated to be the first known MOF for the selective detection of ornidazole antibiotics.