Near-saturated red emitters: four-coordinate copper(i) halide complexes containing 8-(diphenylphosphino)quinoline and 1-(diphenylphosphino)naphthalene ligands

Li Ping Liu, Qian Li, Song Po Xiang, Li Liu*, Xin Xin Zhong, Chen Liang, Guang Hua Li, Tasawar Hayat, Njud S. Alharbi, Fa Bao Li, Nianyong ZHU, Wai Yeung WONG, Hai Mei Qin, Lei Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Recently, highly emissive neutral copper halide complexes have received much attention. Here, a series of four-coordinate mononuclear Cu(i) halide complexes, [CuX(dpqu)(dpna)] (dpqu = 8-(diphenylphosphino)quinoline, dpna = 1-(diphenylphosphino)naphthalene, X = I (1), Br (2) and Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. These complexes exhibit near-saturated red emission in the solid state at room temperature and have peak emission wavelengths at 669-691 nm with microsecond lifetimes (τ = 0.46-1.80 μs). Small S1-T1 energy gaps in the solid state indicate that the emission occurs from a thermally activated excited singlet state at ambient temperature. The emission of the complexes 1-3 mainly originates from MLCT transition. The solution-processed devices of complex 1 exhibit stable red emission with a CIE(x, y) of (0.62, 0.38) for a doped device and (0.63, 0.37) for a non-doped device.

Original languageEnglish
Pages (from-to)9294-9302
Number of pages9
JournalDalton Transactions
Volume47
Issue number28
DOIs
Publication statusPublished - 2018

Scopus Subject Areas

  • Inorganic Chemistry

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