A New V-Shaped Organic Fluorescent Compound Integrated with Crystallization-Induced Emission Enhancement and IntramolecularCharge Transfer
作者:Pei-Yang Gu、You-Hao Zhang、Gao-Yan Liu、Jian-Feng Ge、Qing-Feng Xu、Qichun Zhang、Jian-Mei Lu
DOI:10.1002/asia.201300331
日期:2013.9
The emission behavior of a new V‐shaped organic fluorescent compound (p,p′‐bis(2‐aryl‐1,3,4‐oxadiazol‐5‐yl)diphenyl sulfone (OZA-SO), consisting of diethylamino (donor) and sulfone (acceptor) units, has been studied in various polar solvents and with different morphologies. As expected, there is the gradual transition from the locally excited state to the intramolecular charge‐transfer (ICT) state
新型V形有机荧光化合物(p,p'-双(2-芳基-1,3,4-恶二唑-5基)二苯砜(OZA-SO)的发射行为,由二乙氨基(给体)组成在不同的极性溶剂中和形态不同的化合物中研究了磺基和砜(受体)单元,正如预期的那样,随着溶剂极性的增加,从局部激发态逐渐过渡到分子内电荷转移(ICT)态。由于ICT效应,OZA-SO的强度最初以低水分数(f w)降低,然后以高f w升高,由于结晶诱导的发射增强。同时,OZA-SO的荧光寿命从在二甲基甲酰胺(DMF)中的0.062 ns增加到在包含90%水的溶液中的5.80 ns,然后增加到在包含60%水的溶液中的7.49 ns。此外,由于形态变化,可通过发烟/研磨或发烟/加热将OZA-SO的固态排放从绿色逆转为黄色。OZA-SO的这种颜色可切换功能可能在光学记录和温度感应材料中具有潜在的应用。