Synthesis, Electronic, and Morphological Properties of Tetrahedral Oligothiophenes with n-Hexyl Terminal Groups
作者:Kouzou Matsumoto、Sota Kugo、Daisuke Takajo、Akira Inaba、Yasukazu Hirao、Hiroyuki Kurata、Takeshi Kawase、Takashi Kubo
DOI:10.1002/asia.201100639
日期:2012.1.2
A series of tetrahedral oligothiophenes bearing n‐hexyl groups at the α‐positions of the terminal thiophene rings, (n‐C6H13(C4H2S)n)4C (Hex‐TnTM; n=1–4), has been synthesized by Kosugi–Migita–Stille coupling as a key reaction. Thanks to the improved solubility afforded by the terminal n‐hexyl groups, the largest homologue (n=4) was successfully obtained. Whereas the smaller derivatives (n=1, 2) were
一系列在末端噻吩环的α位带有正己基的四面体寡聚噻吩((n- C 6 H 13(C 4 H 2 S)n)4 C(Hex-T n TM; n = 1– 4)是由Kosugi–Migita–Stille耦合合成的,是一个关键反应。由于末端正己基团提供了更高的溶解度,因此成功获得了最大的同系物(n = 4)。较小的导数(n = 1,2)是液态物质,而较大的导数(n= 3,4)为固体。Hex-T3 TM可能是由于堆积力而在晶体中的相邻噻吩环之间部分采用了顺式构象。Hex‐T3 TM不仅以结晶态出现,而且以非晶态出现,在高达80°C的温度下稳定。无论端基如何,与相应的线性类似物相比,n = 2的衍生物均显示具有大的斯托克斯位移的宽荧光,从而表明联噻吩部分之间存在分子内相互作用。通过循环伏安法测量,Hex-T3 TM的自由基阳离子中还建议了对噻吩支之间的相互作用。