Adsorption of helical and saddle-shaped oligothiophenes on solid surface

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（7）
• 页码范围: 844-849
• 页数: 6页
• 语种: 英文

摘要

The arrangement of oligothiophenes is essential for understanding the relationship between structure and properties particularly in the organic electronic field.The self-assembly behaviors of helical (TMS)2-[7]helicene (T1),naphthalene-cored double (TMS)2-[7]helicene (T2),and saddle-shaped cyelooctatetrathiophene (T3),its derivative α,α,α,α-tetraphenyl-cyclooctate-trathiophene (T4) on solid surface are firstly investigated by using a combination of scanning tunneling microscopy (STM) and density functional theory (DFT) calculation.1,3,5-Tris(10-carboxydecyloxy)-benzene (TCDB) is selected to build flexible host networks to immobilize these oligothiophenes in order to capture their molecular adsorption images successfully.The observed monodisperse or polydisperse filling and long-range alignment of oligothiophenes are described based on the non-covalent interactions and commensurate structure between olihothiophene and cavity.We speculate that those molecularly defined alignments could lead to significantly understanding the application of such ordered monolayer in organic electronic devices.