Highly effective luminescence stemmed from thermally activated delayed fluorescence (TADF) and phosphorescence for the new four-coordinate copper(I) complexes containing N-heterocyclic carbene (NHC) ligands

被引：22

作者：

Wang, Jinglan ^{[1
]}

Chen, Hongyun ^{[1
]}

Xu, Shengxian ^{[1
]}

Su, Qingzhi ^{[1
]}

Zhao, Feng ^{[1
]}

He, Haifeng ^{[1
]}

机构：

[1] Jiangxi Sci & Technol Normal Univ, Sch Chem & Chem Engn, Fenglin St, Nanchang 330013, Jiangxi, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2020年 / 387卷

基金：

中国国家自然科学基金;

关键词：

Thermally activated delayed fluorescence; Copper(I) complex; N-heterocyclic carbene; Photoluminescence quantum yield; Excited-state lifetime; CU(I) COMPLEXES; PHOTOPHYSICAL PROPERTIES; CUPROUS COMPLEXES; BLUE; PHOTOLUMINESCENCE; EMISSION; MONONUCLEAR; EFFICIENCY;

D O I：

10.1016/j.jphotochem.2019.112104

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The two four-coordinate N-heterocyclic carbene (NHC) copper(I) complexes, [Cu(Ph-BenIm-methylPy)(POP)1 PF6 (1), and [Cu(Ph-Im-methylPy)(POP))PF6 (2) Ph-Benin-methylPy = 3-benzyl-1-(6-methyl-pyridin-2-yl)-1H-benzimidazolylidene, Ph-Im-methylPy = 3-benzyl-1-(6-methyl-pyridin-2-yl)-1H-imidazolylidene, POP = bis[2-diphenylphosphino]-phenyl)ether) have been synthesized and characterized. Those complexes exhibit blue to green emission with very high quantum yields and long excited-state lifetimes. The experimental results reveal that the origin of emissive state at room temperature occurs from the combination of TADF and phosphorescence in which phosphorescence predominates TADF, and the corresponding emissive mechanisms were discussed. To the best of our knowledge, the combined emissions with high quantum yield close to ca. 100% have not been previously reported in this library of the four-coordinate NHC-Cu(I) complexes.

引用

页数：7

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