Largely Color-Tuning Prompt and Delayed Fluorescence: Dinuclear Cu(I) Halide Complexes with tert-Amines and Phosphines

Ke Xu, Bu Lin Chen, Fei Yang, Li Liu*, Xin Xin Zhong*, Lei Wang*, Xun Jin Zhu, Fa Bao Li, Wai Yeung Wong*, Hai Mei Qin

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

20 Citations (Scopus)


Luminescent copper(I) halide complexes with bi- and tridentate rigid ligands have gained wide research interests. In this paper, six tetracoordinate dinuclear copper(I) halide complexes, Cu2X2(ppda)2 [ppda = 2-[2-(dimethylamino)phenyl(phenyl)phosphino]-N,N-dimethylaniline, X = I (1), Br (2), Cl (3)] and Cu2X2(pfda)2 [pfda = 2-[2-(dimethylamino)-4-(trifluoromethyl)phenyl(phenyl)phosphino]-N,N-dimethyl-5-trifluoromethylaniline, X = I (4), Br (5), Cl (6)], were successfully prepared and systematically characterized on their structures and photophysical properties. Complexes 1–5 have a centrosymmetric form with a planar Cu2X2 unit, and complex 6 has a mirror symmetry form with a butterfly-shaped Cu2X2. Solid complexes 1, 4, and 5 emit delayed fluorescence at room temperature, intense blue to greenish yellow (λmax = 443–570 nm) light, and their peak wavelengths are located at 443–570 nm with microsecond lifetimes (τ = 0.4–19.2 μs, ΦPL = 0.05–0.48). Complexes 2, 3, and 6 show prompt fluorescence, very weak yellowish green to yellow (λmax = 534–595 nm) emission with peak wavelengths at 534–595 nm, and lifetimes in nanoseconds (τ = 4.4–9.3 ns, ΦPL < 0.0001). (Metal + halide) to ligand and intraligand charge transitions are the main origin of the emission of the complexes. Solution-processed, complex-4-based nondoped and doped devices emit yellow green light with CIE coordinated at (0.41, 0.51), a maximum EQE up to 0.17%, and luminance reaching 75.52 cd/m2.

Original languageEnglish
Pages (from-to)4841-4851
Number of pages11
JournalInorganic Chemistry
Issue number7
Early online date12 Mar 2021
Publication statusPublished - 5 Apr 2021

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


Dive into the research topics of 'Largely Color-Tuning Prompt and Delayed Fluorescence: Dinuclear Cu(I) Halide Complexes with tert-Amines and Phosphines'. Together they form a unique fingerprint.

Cite this