Fluorescent aryl naphthalene dicarboximides with large Stokes shifts and strong solvatochromism controlled by dynamics and molecular geometry
作者:Robert Greiner、Thorben Schlücker、Dominik Zgela、Heinz Langhals
DOI:10.1039/c6tc04453k
日期:——
push–pull fluorophores display a distinct positive solvatochromism of the fluorescence. These optical properties are shown to be significantly dependant on the molecular geometry. Corresponding to TICT, a twist between the donor and the acceptor moiety enhances the intramolecular charge transfer resulting in such pronounced solvatochromism. Complete orthogonalisation inhibits the fluorescence. An intentional
通过金属有机碳-碳偶联反应可有效制备一系列高荧光度的4-芳基取代的萘二甲酰亚胺。获得的推挽式荧光团显示出明显的正溶剂变色现象。这些光学性质显示出显着取决于分子的几何形状。对应于TICT,供体和受体部分之间的扭曲增强了分子内电荷转移,从而导致明显的溶剂合变色。完全正交化会抑制荧光。有意的偏斜排列会导致可调节溶剂的生色团具有高的荧光量子产率,斯托克斯位移超过1.6 eV。