Citation: Hou Jingfei, Tu Bin, Zeng Qingdao, Zhan Chuanlang, Yao Jiannian. The self-assemblies of a newly designed star-shaped molecule end-capped with bromine atoms studied by scanning tunneling microscopy[J]. Chinese Chemical Letters, ;2020, 31(2): 353-356. doi: 10.1016/j.cclet.2019.07.029 shu

The self-assemblies of a newly designed star-shaped molecule end-capped with bromine atoms studied by scanning tunneling microscopy

Hou Jingfei ^a,c ,
Tu Bin ^b,c ,
Zeng Qingdao ^b,d,*, ,
Zhan Chuanlang ^a,c,**, ,
Yao Jiannian ^a,c,**,

a.
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
b.
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
c.
University of Chinese Academy of Sciences, Beijing 100190, China
d.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100149, China

^**

zengqd@nanoctr.cn

clzhan@iccas.ac.cn

jnyao@iccas.ac.cn

Received Date: 25 May 2019
Revised Date: 26 June 2019
Accepted Date: 11 July 2019
Available Online: 11 July 2019

Figures(4)

A new star-shaped molecule StOF-Br₃ containing oligofluorenes and halogen atoms (Bromine) has been synthesized and studied by Scanning Tunneling Microscopy (STM) at the highly oriented pyrolytic graphite (HOPG) surface. We have obtained the high-resolution self-assembled STM images, from which the highly ordered and closely packed non-porous arrangements of the StOF-Br₃ molecular selfassemblies at the heptanoic acid/HOPG surface could be observed. The molecular models and selfassembled StOF-Br₃ architectures have been given in the following text. Besides, we have also figured out the surface free energy by the density functional theory (DFT) calculation, which proved that the halogen…halogen interaction was strong enough to stabilize the ordered molecular self-assemblies. This work verifies the existence of bromine…bromine interactions, and meanwhile provides a kind of effective approach for quickly building ordered molecular nanoarchitectures with large areas and different geometries.
- Molecular self-assemblies,
- Star-shaped molecules,
- Scanning tunneling microscopy (STM),
- Halogen…halogen interactions,
- Bromine atoms
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