Unveiling the photophysical mechanisms in low-dimensional Zn/Cu-based metal halides†

Abstract

The intriguing photophysical mechanisms of low-dimensional metal–halide hybrids are still elusive. This study investigates the optical properties and photophysical mechanisms of (C₆H₈N₂)₂ZnBr₂ and (C₇H₁₀N₂)CuBr₂ crystals. The former shows variable emission due to π-conjugation and intramolecular halogen–hydrogen bonds, while the latter exhibits a broad, temperature-sensitive emission from self-trapped excitons.