Modulation of the charge transfer and photophysical properties in non-fused tetrathiafulvalene-benzothiadiazole derivatives
作者:Flavia Pop、Sabine Seifert、Jihane Hankache、Jie Ding、Andreas Hauser、Narcis Avarvari
DOI:10.1039/c4ob02100b
日期:——
Bis(thiomethyl)- and bis(thiohexyl)-tetrathiafulvalene-bromo-benzothiadiazoles, containing electron donor tetrathiafulvalene (TTF) and electron acceptor benzothiadiazole (BTD) units, have been prepared by Stille coupling reactions between the TTF-SnMe3 precursors and BTD-Br2. In another series of experiments, TTF-acetylene-BTD compounds have been synthesized by Sonogashira coupling between either TTF-acetylenes
含有电子给体四硫富瓦烯(TTF)和电子受体苯并噻二唑(BTD)单元的双(硫代甲基)-和双(硫代己基)-四硫富瓦烯-溴-苯并噻二唑已经通过TTF-SnMe3前体与BTD-Br2之间的Stille偶联反应制备。 。在另一系列实验中,通过Sonogashira偶联以低产率生产TTF-乙炔和BTD-Br2,或以中等产率生产TTF-碘和BTD-乙炔来合成TTF-乙炔-BTD化合物。在与C-BTD相同的化合物TTF-C中,TTF和BTD单元在固态共面,如单晶X射线结构所示,并且在供体和受体单元之间的堆积中存在偏析。通过循环伏安法测定,所有衍生物均具有良好的电子给体性能,而且由于存在BTD部分,它们也可以可逆地减少。紫外可见光谱和光物理研究表明存在分子内电荷转移(ICT)谱带和源自电荷转移的发射谱带。吸收和发射都通过取代方案和炔桥的插入来调节。