Effects of different substituted positions on the photophysical properties of pyrene-based sulfides
作者:Hao Sun、Wen-Hao Sun、Li-Hua Xu、Ran Zhang、Jing Nie、Xiang-En Han、Zhong-Hai Ni
DOI:10.1016/j.molstruc.2019.07.021
日期:2019.12
compounds were structurally characterized and their properties were analyzed by spectroscopy, single crystal X-ray diffraction, electrochemistry and theoretical studies. Significant effect of substituted positions on photophysical properties were observed. The p -methylphenylthio group in 1- and 4-position significantly increases the absolute fluorescence quantum yield ( Ф F ) in solid state, decreases
摘要 通过4-甲基苯硫醇与R-溴芘反应合成了一系列新型芘类硫化物(R = 1( 1 ), 4( 2 ), 2( 3 ))。对这些化合物进行了结构表征,并通过光谱学、单晶 X 射线衍射、电化学和理论研究分析了它们的性质。观察到取代位置对光物理性质的显着影响。与芘相比,1-位和4-位的对甲基苯硫基显着提高了固态的绝对荧光量子产率(ФF),降低了溶液中的ФF,并且几乎不改变薄膜态的ФF。然而,这个 2 位的取代基在溶液中保持了高 Ф F,与芘相比,在固态时几乎对 Ф F 没有贡献,并且在薄膜状态下显着降低 Ф F。此外,化合物1、2和3表现出典型的聚集诱导发射(AIE)特性,时间分辨光致发光证明了这一特性。