Abstract：
Controlling the optical activity of halide perovskite materials through modulation of the coordination configurations of the metal ions is important. Herein, a novel manganese-based halide, specifically diaquatetrakis(methyldiphenylphosphine oxide)manganese(II) tetrachloridomanganate(II), [Mn(C13H13OP)4(H2O)2][MnCl4] or [Mn(MDPPO)4(H2O)2][MnCl4] (MDPPO is methyldiphenylphosphine oxide), was synthesized through the solvothermal reaction of MnCl2 with the neutral molecule MDPPO. In this compound, [Mn(MDPPO)4(H2O)2]2+ acts as the cation, while [MnCl4]2- serves as the anion, enabling the co-existence of tetrahedral and octahedral structures within the same system. Remarkably, the compound exhibits efficient red-light emission at 662 nm, distinct from the green-light emission typically observed in MnX4-based halides. Theoretical calculations show that the red emission comes from the charge transfer from the MDPPO to the Mn2+ of [MnCl4]2-. This work provides a new perspective for the design and synthesis of red-light-emitting manganese-based halides with unique structures.
摘要：
通过调节金属离子的配位构型来控制卤化物钙钛矿材料的光学活性是重要的。在这里，一种新型的锰基卤化物，特别是二水合三（甲基二苯基氧化膦）四氯化锰（II），[Mn(C13H13OP)4(H2O)2][MnCl4]或[Mn(MDPPO)4(H2O)2][MnCl4](MDPPO是甲基二苯基膦氧化物)，通过MnCl2与中性分子MDPPO的溶剂热反应合成。在这个化合物中，[Mn(MDPPO)4(H2O)2]2+作为阳离子，而[MnCl4]2-作为阴离子，使四面体和八面体结构在同一系统内共存。值得注意的是,该化合物在662nm处表现出有效的红光发射，不同于通常在MnX4基卤化物中观察到的绿光发射。理论计算表明，红色发射来自从MDPPO到[MnCl4]2-的Mn2+的电荷转移。这项工作为具有独特结构的发红光的锰基卤化物的设计和合成提供了新的视角。
