Xiao Yuchuan, Tao Jiayu, Peng Xuan, Song Yuting, Lei Peng, Xu Haijun, Xiao Xunwen, Tu Bin, Zeng Qingdao
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China.
School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, China.
ACS Appl Mater Interfaces. 2021 Apr 14;13(14):17129-17138. doi: 10.1021/acsami.1c03201. Epub 2021 Apr 5.
The structures of two-dimensional (2D) self-assembled molecular networks formed by a series of perylene bisimide (PBI) derivatives were investigated by scanning tunneling microscopy (STM). By introducing different functional groups to the PBI rings, we successfully built a different self-assembled molecular network on the liquid-solid interface. When the substituent is propanol, PBI is aligned in lines. When we introduced either an ester group or an amide group to the PBI compounds, they tended to form dimers and trimers. Especially, the PBI with the amide groups can form a 2D porous molecular network by hierarchy self-assembly. The 2D porous molecular network has a great potential to be the host molecule for the accommodation of a guest molecule, coronene (COR), and the structure of the 2D porous molecular network can be tuned by varying the concentration. The density functional theory calculations were also performed to disclose the mechanisms involved.
通过扫描隧道显微镜（STM）研究了一系列苝双酰亚胺（PBI）衍生物形成的二维（2D）自组装分子网络的结构。通过向PBI环引入不同的官能团，我们成功地在液-固界面上构建了不同的自组装分子网络。当取代基为丙醇时，PBI呈线状排列。当我们向PBI化合物中引入酯基或酰胺基时，它们倾向于形成二聚体和三聚体。特别是，带有酰胺基的PBI可以通过分级自组装形成二维多孔分子网络。该二维多孔分子网络极有可能成为容纳客体分子——并五苯（COR）的主体分子，并且可以通过改变浓度来调节二维多孔分子网络的结构。还进行了密度泛函理论计算以揭示其中涉及的机制。
