Abstract: Tetrathienothiophene is an important molecular unit of organic photovoltaic materials.The tetrathienoacene⁃based small molecular semiconductors, combinating a dialkylated tetrathienoacene central core with styrene end⁃capping moieties, are synthesized through Stille coupling reactions.The molecular structure of compound has been analyzed by 1H⁃NMR spectrometry.Thermogravimetric Analysis(TGA),UV⁃visible absorption spectrum(UV⁃Vis),Fluorescence emission spectrum(PL) and Electrochemical cyclic voltammetry(CV) were used to characterized the thermal properties,optical properties and electrochemical properties of the prepared compound.The compound shows UV⁃absorption peaks at 429,453 nm,and a large red shift occurs.The EHOMO=-5.57 eV was calculated by cyclic voltammetry.

Key words: Tetrathienothiophene, End?capped, Coupling reaction, Optoelectronic properties

摘要： 稠环噻吩是有机光电功能小分子中非常重要的结构单元，以十七烷基侧链取代的稠环噻吩为中心结构，通过过渡金属催化的Stille交叉偶联反应引入苯乙烯封端基团，简单高效地合成了一种新的带有烯基封端基团的侧链十七烷基取代的四并噻吩分子。利用核磁共振氢谱对产物结构进行表征，同时采用热重分析、紫外⁃可见光吸收光谱、荧光发射光谱及电化学循环伏安法考察了材料的光电性质。化合物在429、453 nm处出现紫外吸收峰，发生较大红移，循环伏安法测得EHOMO=-5.57 eV。

关键词: 稠环噻吩, 封端, 偶联反应, 光电性质