Synthesis, structure and red-light emission of a manganese halide directed by a methyldiphenylphosphine oxide complex

Author:

Li Jia-WeiORCID,Niu Mengyuan,Feng Wei,Dong Wenke,Liu Yanjie,Yang Jingjing,Wang Chunjie,Zhang Hui,Song Wei-Wu

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 MnX 4-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.

Funder

the National Natural Science Foundation of China

Key Scientific and Technological Project of Henan Province

the Specialized Research Fund for the Doctoral Program of Zhoukou Normal University

Publisher

International Union of Crystallography (IUCr)

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