Fluorenone Organic Crystals: Two-Color Luminescence Switching and Reversible Phase Transformations between π–π Stacking-Directed Packing and Hydrogen Bond-Directed Packing
作者:Mao-Sen Yuan、Dong-En Wang、Pengchong Xue、Wenji Wang、Jian-Chun Wang、Qin Tu、Zhiqiang Liu、Yang Liu、Yanrong Zhang、Jinyi Wang
DOI:10.1021/cm500441r
日期:2014.4.8
aggregation-induced emission (AIE) properties with high solid-state fluorescence quantum yields (29–65%). Among them, 2,7-bis(4-methoxyphenyl)-9H-fluoren-9-one (2) and 2,7-bis(4-ethylphenyl)-9H-fluoren-9-one (6) display reversible stimuli-responsive solid-state luminescence switching. Compound 2 transforms between red and yellow crystals (the emission wavelength switches between 601 and 551 nm) under the
近年来,具有能够通过改变分子堆积方式而不改变其组成分子的化学结构来可逆地切换发光能力的有机固态发光切换(SLS)材料引起了人们的极大兴趣。在这项工作中,我们设计并合成了一类新的2,7- diphenylfluorenone衍生物(化合物1 - 6),其表现出与高固态荧光量子产率(29-65%)突出的聚集诱导的发射(AIE)性质。其中,2,7-双(4-甲氧基苯基)-9 H-芴-9 -one(2)和2,7-双(4-乙基苯基)-9 H-芴-9 -one(6))显示可逆的刺激响应型固态发光开关。在温度,压力或溶剂蒸汽的刺激下,化合物2在红色和黄色晶体之间转换(发射波长在601和551 nm之间切换)。同样,化合物6表现出SLS行为,并且在橙色(571 nm)和黄色(557 nm)之间进行发光切换。八个X射线单晶结构,光物理性质的表征,粉末X射线衍射和差示扫描量热法提供了对固态荧光行为的结构-性质关