Largely Color-Tuning Prompt and Delayed Fluorescence: Dinuclear Cu(I) Halide Complexes with tert-Amines and Phosphines.
Largely Color-Tuning Prompt and Delayed Fluorescence: Dinuclear Cu(I) Halide Complexes with tert-Amines and Phosphines.
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很大程度上颜色调节提示和延迟荧光：双核卤化铜 (I) 与叔胺和膦的配合物。
DOI：
10.1021/acs.inorgchem.0c03755
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发表时间：
2021
影响因子：
4.6
通讯作者：
Hai
中科院分区：
文献类型：
--
作者：
Ke Xu;Bu;Fei Yang;Li Liu;Xin;Lei Wang;Xunjin Zhu;F. Li;W. Wong;Hai
具有二齿和三齿刚性配体的卤化铜（I）发光配合物已引起广泛的研究兴趣。本文合成了六个四配位双核卤化铜配合物Cu_2X_2（Ppda）_2 [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Cu 2X2（pfda）2 [pfda = 2-[2-（2-甲基氨基）苯基）膦基]-N，N-二甲基苯胺，X = I（1），Br（2），Cl（3）]。（二甲氨基）-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）]，并对其结构和物理性能进行了系统的表征。配合物1-5具有中心对称的形式，具有平面Cu 2X 2单元，配合物6具有镜像对称的形式，具有蝴蝶形Cu 2X 2单元。固体配合物1、4和5在室温下发射延迟荧光，其峰值波长位于443 - 570 nm，荧光寿命为微秒（τ = 0.4-19.2 μs，ΦPL = 0.05-0.48）。配合物2、3和6显示出快速荧光，非常弱的黄绿色至黄色（λmax = 534-595 nm）发射，峰值波长在534-595 nm，寿命以纳秒计（τ = 4.4-9.3 ns，ΦPL < 0.0001）。（金属+卤化物）到配体和配体内电荷跃迁是络合物发射的主要来源。溶液处理的、基于络合物4的未掺杂和掺杂的器件发射黄绿色光，CIE协调在（0.41，0.51），最大EQE高达0.17%，亮度达到75.52 cd/m2。
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.