Citation: Song Huanjun, Li Na, Zhu Hao, Peng Zhantao, Zhao Wenhui, Chen Haoran, Chen Wei, Wang Yongfeng, Wu Kai. Dipole and charge effects of chloroaluminum phthalocyanine revealed by local work function measurements at sub-molecular level[J]. Chinese Chemical Letters, ;2018, 29(3): 429-432. doi: 10.1016/j.cclet.2017.07.013 shu

Dipole and charge effects of chloroaluminum phthalocyanine revealed by local work function measurements at sub-molecular level

Song Huanjun ^a ,
Li Na ^b ,
Zhu Hao ^a ,
Peng Zhantao ^a ,
Zhao Wenhui ^a ,
Chen Haoran ^a ,
Chen Wei ^c ,
Wang Yongfeng ^b,, ,
Wu Kai ^a,,

a.
BNLMS, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
b.
Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
c.
Department of Chemistry, National University of Singapore, Singapore 117543, Singapore

Corresponding author: Wang Yongfeng, yongfengwang@pku.edu.cn Wu Kai, kaiwu@pku.edu.cn
Received Date: 24 May 2017
Revised Date: 14 June 2017
Accepted Date: 10 July 2017
Available Online: 13 March 2017

Figures(5)

Work function plays a significant role in surface chemistry. Local work function provides the information of local dipole-dipole interaction and charge distribution between adsorbates and substrate, highlighting the local charge effect of the targeted spot which is normally smeared out in conventional average work function measurements. Chloroaluminum phthalocyanine (ClAlPc), an important optoelectronic molecule with a permanent dipole moment pointing from the Pc ring to the ending Cl atom, adsorbed on Au(111) in either Cl-up or Cl-down configuration. Scanning tunneling microscopy/spectroscopy measurements revealed that at the centers of Cl-up and Cl-down molecules, the local work functions changed oppositely with respect to the Au(111) substrate. At their Pc lobes, however, the local work functions unanimously increased due to charging effect of the indole lobes in the ClAlPc molecule.
- Chloroaluminum phthalocyanine,
- Local work function,
- Dipole orientation,
- Scanning tunneling microscopy,
- Surface dipole
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