{Reference Type}: Journal Article
{Title}: Synthesis, structure and red-light emission of a manganese halide directed by a methyldiphenylphosphine oxide complex.
{Author}: Li JW;Niu M;Feng W;Dong W;Liu Y;Yang J;Wang C;Zhang H;Song WW;
{Journal}: Acta Crystallogr C Struct Chem
{Volume}: 80
{Issue}: 0
{Year}: 2024 Aug 1
{Factor}: 1.184
{DOI}: 10.1107/S2053229624006405
{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.