Xu Ke, Chen Bu-Lin, Yang Fei, Liu Li, Zhong Xin-Xin, Wang Lei, Zhu Xun-Jin, Li Fa-Bao, Wong Wai-Yeung, Qin Hai-Mei
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei University, Wuhan 430062, P.R. China.
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China.
Inorg Chem. 2021 Apr 5;60(7):4841-4851. doi: 10.1021/acs.inorgchem.0c03755. Epub 2021 Mar 12.
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, CuX(ppda) [ppda = 2-[2-(dimethylamino)phenyl(phenyl)phosphino]-,-dimethylaniline, X = I (), Br (), Cl ()] and CuX(pfda) [pfda = 2-[2-(dimethylamino)-4-(trifluoromethyl)phenyl(phenyl)phosphino]-,-dimethyl-5-trifluoromethylaniline, X = I (), Br (), Cl ()], were successfully prepared and systematically characterized on their structures and photophysical properties. Complexes - have a centrosymmetric form with a planar CuX unit, and complex has a mirror symmetry form with a butterfly-shaped CuX. Solid complexes , , and emit delayed fluorescence at room temperature, intense blue to greenish yellow (λ = 443-570 nm) light, and their peak wavelengths are located at 443-570 nm with microsecond lifetimes (τ = 0.4-19.2 μs, Φ = 0.05-0.48). Complexes , , and show prompt fluorescence, very weak yellowish green to yellow (λ = 534-595 nm) emission with peak wavelengths at 534-595 nm, and lifetimes in nanoseconds (τ = 4.4-9.3 ns, Φ < 0.0001). (Metal + halide) to ligand and intraligand charge transitions are the main origin of the emission of the complexes. Solution-processed, complex--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/m.
具有双齿和三齿刚性配体的发光卤化亚铜（I）配合物已引起广泛的研究兴趣。本文成功制备了六种四配位双核卤化亚铜（I）配合物，即CuX(ppda) [ppda = 2-[2-(二甲基氨基)苯基(苯基)膦基]-N,N-二甲基苯胺，X = I (1)、Br (2)、Cl (3)] 和CuX(pfda) [pfda = 2-[2-(二甲基氨基)-4-(三氟甲基)苯基(苯基)膦基]-N,N-二甲基-5-三氟甲基苯胺，X = I (4)、Br (5)、Cl (6)]，并对其结构和光物理性质进行了系统表征。配合物1-3具有中心对称形式，带有平面CuX单元，配合物4具有镜像对称形式，带有蝶形CuX。固态配合物1、2和3在室温下发射延迟荧光，发出强烈的蓝色至黄绿色（λ = 443 - 570 nm）光，其峰值波长位于443 - 570 nm，微秒级寿命（τ = 0.4 - 19.2 μs，Φ = 0.05 - 0.48）。配合物4、5和6显示出瞬发荧光，发出非常微弱的黄绿色至黄色（λ = 534 - 595 nm）发射光，峰值波长在534 - 595 nm，寿命在纳秒级（τ = 4.4 - 9.3 ns，Φ < 0.0001）。（金属 + 卤化物）到配体和配体内电荷转移是配合物发射的主要起源。基于溶液处理的配合物1 - 4的非掺杂和掺杂器件发出黄绿色光，CIE坐标为(
