Synthesis of Three-Dimensionally Extended Giant Oligothiophenes Based on Tetrathienylmethane

合成了一系列四(2-噻吩基)甲烷的进一步的噻吩环延伸的衍生物。这些衍生物表现出比相应的线性类似物更长的吸收和荧光波长。值得注意的是，这些衍生物不仅表现出高度的结晶倾向，反映了高度对称的分子结构，而且基于许多稳定的构象而形成了稳定的无定形状态。

A series of the derivatives of tetrakis(2-thienyl)methane extended with further thiophene rings have been synthesized. These derivatives exhibited the longer absorption and fluorescence wavelengths than those of the corresponding linear analogues. It should be noted that these derivatives not only showed the high tendency to crystallize reflecting the highly symmetric molecular structure but also the stable amorphous state based on the many stable conformers.