Solid-State\nReversible Phase Transition and Photoluminescence\nProperties of Organic-Inorganic Hybrid Halide: (BTPA)<sub>2</sub>MnBr<sub>4</sub>

Multifunctional materials have long been a popular research\narea,\nwith organic-inorganic hybrids frequently utilized due to their diverse\nproperties and versatile assembly techniques. In this context, a novel\nMn-based organic-inorganic hybrid compound (BTPA)<sub>2</sub>MnBr<sub>4</sub>(<b>1</b>) was prepared, with strong green photoluminescence,\nphase transition under thermal stimulation, and two reversible dielectric-state\nswitches. This compound exhibits strong green photoluminescence under\nultraviolet excitation, boasting a quantum yield of 44.36%. Furthermore,\nit demonstrates a reversible ferroelastic phase transition at 358/348\nK. The integration of temperature and photosensitivity in compound <b>1</b> opens up new avenues for the development and exploration\nof a broader spectrum of multifunctional phase transition materials.