Fluorene-based novel highly emissive fluorescent molecules with aggregate fluorescence change or aggregation-induced emission enhancement characteristics
作者:Zhao Chen、Jinhua Liang、Xie Han、Jun Yin、Guang-Ao Yu、Sheng Hua Liu
DOI:10.1016/j.dyepig.2014.06.025
日期:2015.1
Their aggregate fluorescence change and aggregation-induced emission enhancement (AIEE) characteristics were investigated by luminescence and UV/Vis spectroscopies. The results indicate that luminogens 1d and 2d, containing formamide units, exhibit significant fluorescence color changing upon aggregate formation, which is a newly observed uncommon and interesting aggregation-induced emission phenomenon
已经合成了一系列基于芴的含有甲酰胺或芴酮单元的发光剂,并通过NMR光谱,质谱和元素分析对其进行了表征。通过发光和紫外/可见光谱研究了它们的聚集荧光变化和聚集诱导的发射增强(AIEE)特性。结果表明,包含甲酰胺单元的发光剂1d和2d在聚集体形成时显示出显着的荧光颜色变化,这是新近观察到的不常见且有趣的聚集诱导的发射现象。虽然发光剂3d具有一个芴酮单元和一个芴单元的溶液在溶液中微弱地发射,在聚集状态下具有高荧光性,并表现出典型的AIEE特性。与3d相比,具有一个芴酮单元和两个芴单元的发光剂4d显示出较弱的AIEE行为。在薄膜和固态状态下,光致发光剂1d显示出强烈的黄绿色发射光,而其他光致发光剂则显示出强烈的黄绿色发射光。在这些发光剂中,4d表现出最高的固态发射量子产率。