A Hybrid Manganese Bromide with a Reversible Phase Transition and Flexible X-ray Imaging

A new hybrid manganese bromide, (PP13)₂MnBr₄ (PP13⁺ = N-propyl-N-methylpiperidinium), was synthesized through a facile and environmentally friendly method. (PP13)₂MnBr₄ shows bright green photoluminescence with a high quantum yield of 63.98%. Its photoluminescence (PL) intensity significantly decreases during the phase transition, accompanied by a pronounced dielectric anomaly. Interestingly, (PP13)₂MnBr₄ demonstrates excellent scintillation performance under X-ray excitation, with a light yield of 24124.4 photons/MeV. The temperature-sensitive luminescence and dielectric properties of (PP13)₂MnBr₄, combined with its excellent X-ray detection capability, suggest that (PP13)₂MnBr₄ has potential multifunctional applications in the optoelectronic field.