title: Molecular architecture of oligothiophene on a highly oriented pyrolytic graphite surface by employing hydrogen bondings.
abstract: To achieve a controllable and predictable molecular architecture on a two-dimensional (2D) surface, a series of oligothiophenes with carboxylic groups and alkane chains were synthesized. The alkane chains and carboxylic groups, which can form hydrogen bonding, were intentionally designed in different positions of the oligothiophenes. The resulted molecular architectures by using the so-prepared oligothiophenes on a highly oriented pyrolytic graphite (HOPG) surface were investigated by scanning tunneling microscopy (STM) and density functional theory (DFT). It is found that the hydrogen bonding plays an essential role in the formation of the ordered assemblies. A controlled 2D molecular assembly could be fabricated by using hydrogen bondings.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Xu
authors.forename: Jian-Ru
authors.initials: JR
authors.lastname: Gong
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wan
authors.forename: Tong-Gang
authors.initials: TG
authors.lastname: Jiu
authors.forename: Yu-Liang
authors.initials: YL
authors.lastname: Li
authors.forename: Dao-Ben
authors.initials: DB
authors.lastname: Zhu
authors.forename: Ke
authors.initials: K
authors.lastname: Deng