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, Nian Yong Zhu, Wai Yeung Wong, Hai Mei Qin, Lei Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


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 S 1 -T 1 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
Issue number28
Publication statusPublished - 1 Jan 2018

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this