Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (12): 2774.doi: 10.7503/cjcu20180496

• Polymer Chemistry • Previous Articles     Next Articles

Coordinate Interaction Between Monosulfide and Au Surfaces

LI Xun1,2, XUE Yurui1, SONG Yu2,*(), ZHANG Wenke1   

  1. 1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry
    2. Institute of Theoretical Chemistry, Jilin University, Changchun 130012, China
  • Received:2018-07-11 Online:2018-10-26 Published:2018-10-26
  • Contact: SONG Yu E-mail:songyu16@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos. 21525418, 21474041, 91127031, 21504030).

Abstract:

We have employed atomic force microscopy(AFM)-based single molecule force spectroscopy(SMFS) to quantify the stability of the individual thioether-gold contact in isolated as well as in a self-assembled monolayer. The external factors that affect the sulfide-gold binding strength were investigated at the single-molecule level. The results show that the alkyl sulfide molecule formed coordinate bond on gold surface. Compared with reduced gold, the oxidized gold can enhance the sulfide-gold interactions in both isolated individual monosulfide-gold contacts and in self-assembled membranes(SAMs). Also, the solution condition can affect the stability of Au—S coordinate bonds.

Key words: Interaction between monosulfide and Au surface, Coordinate bond, Single-molecule force spectroscopy, Solvent effect, Self-assembled membrane

CLC Number: 

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