TY - JOUR
T1 - Largely Color-Tuning Prompt and Delayed Fluorescence
T2 - Dinuclear Cu(I) Halide Complexes with tert-Amines and Phosphines
AU - Xu, Ke
AU - Chen, Bu Lin
AU - Yang, Fei
AU - Liu, Li
AU - Zhong, Xin Xin
AU - Wang, Lei
AU - Zhu, Xun Jin
AU - Li, Fa Bao
AU - Wong, Wai Yeung
AU - Qin, Hai Mei
N1 - Funding Information:
L.L. thanks the National Natural Science Foundation of China (21671061) and application foundation frontier special project from Wuhan Science and Technology Bureau (2019010701011414) for financial support. Thanks to senior engineer Mingxing Chen (Peking University) for the photophysical measurements.
Publisher copyright:
© 2021 American Chemical Society
PY - 2021/4/5
Y1 - 2021/4/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85103436381&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.0c03755
DO - 10.1021/acs.inorgchem.0c03755
M3 - Journal article
C2 - 33711236
AN - SCOPUS:85103436381
SN - 0020-1669
VL - 60
SP - 4841
EP - 4851
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 7
ER -