Controlling Metallophilic Interactions in Chiral Gold(I) Double Salts towards Excitation Wavelength‐Tunable Circularly Polarized Luminescence
作者:Jian‐Gong Yang、Kai Li、Jian Wang、Shanshan Sun、Weijie Chi、Chao Wang、Xiaoyong Chang、Chao Zou、Wai‐Pong To、Ming‐De Li、Xiaogang Liu、Wei Lu、Hong‐Xing Zhang、Chi‐Ming Che、Yong Chen
DOI:10.1002/anie.202000792
日期:2020.4.20
photoluminescence originates from multiple emissive excited states as a result of the existence of varied Au(I)···Au(I) distances in ground state. The steric properties of the NHC ligand are crucial to the tuning of Au(I)···Au(I) distances. We also demonstrate an anti-counterfeiting application using these two salts. This unique Ex-De CPL mechanism of the metal complex double salts opens a new avenue for the
在可见光区域表现出与激发波长有关的光致发光(Ex-De PL)的材料在生物成像,光电和防伪方面具有潜在的应用。在这里,我们报告两个多功能的手性[Au(NHC)2] [Au(CN)2](NHC =(4R,5R)/(4S,5S)-1,3-二甲基-4,5-二苯基-4 ,5-二氢-咪唑啉-2-亚烷基)复合复盐在掺杂的聚合物薄膜和粉末状态下显示Ex-De圆偏振发光(CPL)。通过改变激发波长,可以将其发射最大值从440 nm动态调谐到530 nm。通过实验和理论研究,我们提出,由于基态存在不同的Au(I)···Au(I)距离,导致连续可调光致发光源自多个发射激发态。NHC配体的空间特性对于调整Au(I)··Au(I)距离至关重要。我们还演示了使用这两种盐的防伪应用。金属络合物双盐的独特的Ex-De CPL机制通过操纵非共价金属···金属相互作用为智能光致发光材料的开发开辟了一条新途径。