Highly solvatochromic fluorescence of anthraquinone dyes based on triphenylamines
作者:Yanxia Li、Tingfeng Tan、Shirong Wang、Yin Xiao、Xianggao Li
DOI:10.1016/j.dyepig.2017.05.024
日期:2017.9
solvatochromic fluorescence (>190 nm emission shift in polar media), which was derived from intramolecular charge transfer (ICT) character that revealed by DFT/TD-DFT calculation. And large Stokes shifts (210–306 nm) were observed in different organic solvents, along with rich color changes from blue to green, yellow, orange and even purple-red. The Stokes shifts were linearly dependent on the solvent polarity
通过Suzuki反应合成了五种不同取代基的基于苯胺/三苯胺的供体-受体蒽醌染料,并在不同极性的有机溶剂中研究了其光物理性质。标题染料显示出显着的溶剂化变色荧光(在极性介质中发射波长大于190 nm),这是通过DFT / TD-DFT计算得出的分子内电荷转移(ICT)特性得出的。在不同的有机溶剂中观察到较大的斯托克斯位移(210–306 nm),并且颜色从蓝色变为绿色,黄色,橙色甚至紫红色。斯托克斯位移线性依赖于溶剂极性函数E T(30)。有趣的是,从单晶X射线衍射分析发现,染料图3显示了两种不同的交错通道结构,这在有机化合物中很少见,可以潜在地用作络合物的宿主。电化学表征表明,连接至蒽醌单元的不同取代苯胺基团可能导致可调节的电势和能级。