Liu Qi, Xie Mo, Chang Xiaoyong, Cao Shuang, Zou Chao, Fu Wen-Fu, Che Chi-Ming, Chen Yong, Lu Wei
Technical Institute of Physics and Chemistry & University of, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Department of Chemistry, South University of Science and Technology of China, Shenzhen, Guangdong, 518055, P. R. China.
Angew Chem Int Ed Engl. 2018 May 22;57(21):6279-6283. doi: 10.1002/anie.201803965. Epub 2018 Apr 25.
A total of 35 [Au(NHC) ][MX ] (NHC=N-heterocyclic carbene; M=Au or Cu; X=halide, cyanide or arylacetylide) complex salts were synthesized by co-precipitation of [Au(NHC) ] cations and [MX ] anions. These salts contain crystallographically determined polymeric Au⋅⋅⋅Au or Au⋅⋅⋅Cu interactions and are highly phosphorescent with quantum yields up to unity and emission color tunable in the entire visible regions. The nature of the emissive excited states is generally assigned to ligand (anion)-to-ligand (cation) charge-transfer transitions assisted by d ⋅⋅⋅d metallophilicity. The emission properties can be further tuned by controlled triple-component co-crystallization or by epitaxial growth. Correct recipes for white light-emitting phosphors with quantum yields higher than 70 % have been achieved by screening the combinatorial pool.
通过共沉淀[Au(NHC)]阳离子和[MX]阴离子，总共合成了35种[Au(NHC)][MX]（NHC = N-杂环卡宾；M = Au或Cu；X = 卤化物、氰化物或芳基乙炔化物）络合盐。这些盐包含晶体学确定的聚合物Au⋅⋅⋅Au或Au⋅⋅⋅Cu相互作用，并且具有高磷光性，量子产率高达1，发射颜色可在整个可见光区域内调节。发射激发态的性质通常归因于由d⋅⋅⋅d亲金属性辅助的配体（阴离子）到配体（阳离子）的电荷转移跃迁。发射特性可以通过受控的三元共结晶或外延生长进一步调节。通过筛选组合库，已经获得了量子产率高于70%的白色发光磷光体的正确配方。
