Two manganese chloride organic-inorganic hybrid compounds showing strong luminescence and switchable phase transition and dielectric anomaly

• Published in: New journal of chemistry 2022-10, Vol.46 (41), p.25-29
• Main Authors: You, Xiuli, Wang, Lingyu, Peng, Ziqin, Wei, Zhenhong
• Format: Article
• Language: English
• Subjects: Aqueous solutions; Chemical synthesis; Dielectric strength; Hydrochloric acid; Luminescence; Manganese; Multifunctional materials; Perovskites; Phase transitions
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d2nj03588j

Organic-inorganic hybrid perovskites are categorized as multifunctional materials due to their structural designability and functional diversity. Herein, two manganese-based organic-inorganic perovskite type compounds [Me 3 NNH 2 ]MnCl 3 ( 1 ) and [(CH 3 ) 3 NCH 2 CH 2 F] 2 MnCl 4 ( 2 ) were synthesized by reactions of trimethylhydrazine iodide and (fluoromethyl)trimethylammonium bromide with MnCl 2 in concentrated hydrochloric acid aqueous solution. Differential scanning calorimetry (DSC) and dielectric measurements revealed that compounds 1 and 2 undergo reversible phase transitions at about 327 K and 352 K, respectively. Significantly, under the excitation of 365 nm, compounds 1 and 2 emit green and red luminescence, which originate from the octahedral [MnCl 6 ] and tetrahedral [MnCl 4 ] moieties. Two organic-inorganic hybrid manganese halide perovskite compounds [Me 3 NNH 2 ]MnCl 3 and [(CH 3 ) 3 NCH 2 CH 2 F] 2 MnCl 4 exhibit switchable phase transition and dielectric anomaly, and also emit strong red and green luminescence.