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Tailoring Narrow-Band Green Photoluminescence in Manganese Hybrid Halides via Solvent-Free Mechanosynthesis and Anion Exchange for Advanced Optical Applications
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DOI：10.1002/adom.71593.png)
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Abstract
En 中文
Solvent-free mechanochemical synthesis represents an eco-friendly and highly efficient strategy toward functional materials, eliminating organic solvents, shortening synthetic durations, and enabling rapid construction of unprecedented crystalline structures via solid-state grinding. Manganese hybrid halides (Br4 and Br2I2) were successfully prepared via a facile solvent-free mechanosynthesis combined with Br−/I− anion exchange. The as-synthesized samples exhibit tunable narrow-band green photoluminescence (518 nm for Br4, 533 nm for Br2I2) with a full width at half maximum of ≈44 and 47 nm. Photoluminescence properties confirm that anion exchange modulates the Mn2+ crystal field environment, realizing PL tunability based on the spin-forbidden d-d transition. Benefiting from their superior luminescent properties, the samples were successfully applied in backlight LED, multi-level fluorescent anti-counterfeiting, latent fingerprint detection and X-ray imaging. The present research establishes a sustainable and scalable synthetic strategy toward high-performance Mn2+-based hybrid halides, and further extends their practical utilization in optoelectronic applications and analytical detection.
Keywords:
anion exchange
manganese hybrid halides
solvent-free mechanosynthesis
X-ray imaging
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