Manganese-based organic metal halides, due to their excellent optoelectronic properties and stable chemical nature, have been widely used in optoelectronic devices and sensors. In this study, through rational modulation of halogens, three novel zero-dimensional organic manganese halides [(C₆H₈N)₂MnX₄ (X = Cl, Br, and I)] were obtained by changing the halogen atom via the solvent evaporation method. Due to the d–d electronic transition of Mn²⁺ in the tetrahedrally coordinated [MnX₄]²⁻ polyhedron, all samples exhibit strong green emission. Notably,(C₆H₈N)₂MnBr₄ exhibited a remarkable light yield of 18 224 photons per MeV and a low detection limit of 1.9 μGy s⁻¹, which is below the X-ray diagnostic limit and even superior to that of commercial BGO scintillators. Moreover, a 9 cm × 9 cm flexible scintillator film was successfully fabricated by mixing (C₆H₈N)₂MnBr₄ crystalline powder with polymethyl methacrylate, and this film manifested superior radiation stability and an X-ray imaging resolution of 12.1 lp mm⁻¹. Notably, the X-ray images captured by the flexible film demonstrate distinguished clarity when adhered perfectly to curved metal sheets. The combination of excellent performance and facile solution processing opens new opportunities for low-cost, high-performance organic metal halide-based large-area flexible scintillators for X-ray detection and imaging.

中文翻译：

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有机卤化锰中卤素的调制，用于高分辨率和大面积柔性 X 射线成像


锰基有机金属卤化物由于其优异的光电性能和稳定的化学性质，已被广泛用于光电器件和传感器。在本研究中，通过对卤素的合理调制，通过溶剂蒸发法改变卤素原子，获得了三种新型零维有机卤化锰[（C₆H₈N）₂MnX₄ （X = Cl， Br， and I）]。由于 Mn²⁺ 在四面体配位 [MnX₄]²⁻ 多面体中的 d-d 电子跃迁，所有样品都表现出强烈的绿色发射。值得注意的是，（C₆H₈N）₂MnBr₄ 表现出每 MeV 18 224 个光子的显着光产额和 1.9 μGy ^s-1 的低检测限，低于 X 射线诊断限值，甚至优于商用 BGO 闪烁体。此外，通过将 （C₆H₈N）₂MnBr₄ 结晶粉末与聚甲基丙烯酸甲酯混合，成功制备了 9 cm × 9 cm 柔性闪烁体薄膜，该薄膜表现出优异的辐射稳定性和 12.1 lp ^mm-1 的 X 射线成像分辨率.值得注意的是，当完美地粘附在弯曲的金属板上时，柔性薄膜捕获的 X 射线图像显示出卓越的清晰度。 卓越的性能和简单的溶液处理相结合，为用于 X 射线探测和成像的低成本、高性能基于有机金属卤化物的大面积柔性闪烁体开辟了新的机会。