The self-assembly and structural regulation of a hydrogen-bonded dimeric building block formed by two N-H…O hydrogen bonds on HOPG  

作　　者：Peng Lei Lin Ma Siqi Zhang Jianqiao Li Linlin Gan Ke Deng Wubiao Duan Wei Li Qingdao Zeng 

机构地区：[1]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 [2]Department of Chemistry,School of Science,Beijing Jiaotong University,Beijing 100044,China [3]Center of Material Science and Optoelectonics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Science,Nanchang Institute of Technology,Nanchang 330099,China

出　　处：《Chinese Chemical Letters》2023年第8期416-420,共5页中国化学快报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.21972031,12064026 and 22272039);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB36000000);Jilin Chinese Academy of Sciences-Yanshen Technology Co.,Ltd.

摘　　要：The self-assembled behavior of an unsymmetric molecule(BCDTDA)with one imidazole group as center and benzoic acid group as functional group is studied,and the regulatory behaviors of coronene(COR)and three bipyridine derivatives(named BP,PEBP-C4 and PEBP-C8)on BCDTDA self-assembly structures are also investigated.Based on highly oriented pyrolytic graphite(HOPG)substrate,scanning tunneling microscopy(STM)is used to observe the variation of assembled behaviors at the solid-liquid interface.Because of the concentration effect,BCDTDA molecules can assemble into grids and Kagomés structures in the form of N–H…O hydrogen bonded dimers.BCDTDA molecules still maintain dimeric structures in the regulation of COR and BP molecules to BCDTDA self-assembly.However,PEBP-C4 and PEBP-C8 destroy the structure of the dimers,and form a variety of co-assembled structures with BCDTDA.Different guest molecules coordinate the host molecules differently,which makes the experiment more meaningful.Combined with density functional theory(DFT)calculation,the discovery of molecular interactions provides a promising strategy for the construction of functional nanostructures and devices.

关 键 词：Self-assembly REGULATION Scanning tunneling microscopy DFT calculations Co-assemble 

分 类 号：O641.1[理学—物理化学]