Thermoinduced structural-transformation and luminescent conversion in hybrid manganese halides

Chunli Jiang; Qianqian Luo; Chunhua Luo; Hechun Lin; Hui Peng

doi:10.1088/1361-648X/ac4aaa

Thermoinduced structural-transformation and luminescent conversion in hybrid manganese halides

J Phys Condens Matter. 2022 Feb 7;34(15). doi: 10.1088/1361-648X/ac4aaa.

Authors

Chunli Jiang¹, Qianqian Luo¹, Chunhua Luo¹, Hechun Lin¹, Hui Peng^{1

2}

Affiliations

¹ Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China.
² Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, People's Republic of China.

PMID: 35021161
DOI: 10.1088/1361-648X/ac4aaa

Abstract

We report here the synthesis of hybrid manganese halide crystals, (C₄H₇N₂)MnCl₃· H₂O and (C₄H₇N₂)₂MnCl₄, by using the same organic ligand 2-methylimidazole. Upon heating treatment, the red-emissive (C₄H₇N₂)MnCl₃· H₂O crystal is structurally transformed into green-emissive (C₄H₇N₂)₂MnCl₄crystalin situ. The crystal structural analysis reveals that the [MnCl₅· H₂O]^3-octahedra chains decompose into mono [MnCl₄]^2-tetrahedra, accompanied by the departure of H₂O molecules. Upon cooling in air or water vapor, the crystal structure and luminescence of (C₄H₇N₂)₂MnCl₄are transformed to those of (C₄H₇N₂)MnCl₃· H₂O. Thein situconversion of luminescence between (C₄H₇N₂)MnCl₃· H₂O and (C₄H₇N₂)₂MnCl₄provides new insight into the potential application of hybrid manganese halides.

Keywords: hybrid manganese halides; thermochromic luminescence; thermoinduced structural-transformation.