Issue 8, 2025

New highly efficient phosphorescent manganese halides as green and blue emitters

Abstract

Three new manganese compounds on 5-(pyridin-2-yl)-3-phenyl-1,2,4-triazole (L) basis (HL)4[MnBr4]2·H2O (1), (HL)2[MnCl4] (2) and [MnL2Cl2]·H2O (3) have been synthesized and characterized in terms of their structure, photoluminescence (PL), and electroluminescence (EL) properties. Compounds 1 and 2 exhibit bright green luminescence (λem ≈ 550 nm) with high quantum yields of 75.1 and 71.2%, and 3 emits unusual blue emission at 438 nm with a quantum yield of 43.9%. Analysis of the spectral properties of complexes 1 and 2 indicates that luminescence is determined by the transfer of excitation energy from the triazole cation to the manganese cation. Electroluminescent devices based on complexes 1 and 3 show high brightness values of 3033 and 5230 Cd m−2, respectively.

Graphical abstract: New highly efficient phosphorescent manganese halides as green and blue emitters

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Article information

Article type
Paper
Submitted
01 Dec 2024
Accepted
02 Jan 2025
First published
20 Jan 2025

Dalton Trans., 2025,54, 3335-3345

New highly efficient phosphorescent manganese halides as green and blue emitters

A. Gusev, M. Kiskin, E. Braga, E. Zamnius, A. Lisichnikov and W. Linert, Dalton Trans., 2025, 54, 3335 DOI: 10.1039/D4DT03343D

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