Pseudohalide Anions Driven Structural Modulation in Distorted Tetrahedral Manganese(II) Hybrids Toward Tunable Green‐Red Emissions
Year: 2024
Type: article
Abstract: Mn(II)‐based halides have recently garnered significant interest as emerging luminescence materials for diverse photonic applications. Generally, Mn(II) hybrids with tetrahedral coordination show green emission, however, ones with octahedral coordination give red emission. Herein, we design the synthesis of tetrahedral Mn(II) pseudohalide hybrids, (RPh 3 P) 2 MnBr x NCS 4−x (R=phenyl, pentyl or methyl; Ph 3 P=triphenylphosphine; x =1–3), achieved by gradually substituting bromides with pseudohalides (NCS − ). Compared to the green‐emitting A 2 MnBr 4 (512 nm), the mixed hybrids exhibit significantly distorted [MnBr x NCS 4−X ] tetrahedra with high dipole moment, thus leading to the distinct Stokes shift energies and noticeable red shift emission in the range of 549–613 nm. Furthermore, the photoluminescence quantum yield (PLQY) of these hybrids correlates strongly with the pair correlation function of Mn(II) ions, specifically the Mn⋅⋅⋅Mn distance. These findings highlight the critical role of dipole moments in determining the emission properties and expand the luminescent family of Mn(II) pseudohalide hybrids.
Authors: Shuai Zhang, Kai Han, Zhiguo Xia
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Funders: National Natural Science Foundation of China, South China University of Technology, State Key Laboratory of Luminescent Materials and Devices, National Outstanding Youth Science Fund Project of National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities
OpenAlex ID: W4404722315