高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (12): 2774-2780.doi: 10.7503/cjcu20180496

• 高分子化学 • 上一篇    下一篇

硫醚-金配位相互作用的单分子力谱研究

李逊1,2, 薛玉瑞1, 宋宇2(), 张文科1   

  1. 1. 吉林大学化学学院, 超分子结构与材料国家重点实验室
    2. 理论化学研究所, 长春 130012
  • 收稿日期:2018-07-11 出版日期:2018-10-26 发布日期:2018-10-26
  • 作者简介:

    联系人简介: 宋 宇, 男, 博士, 讲师, 主要从事单分子力谱研究. E-mail: songyu16@jlu.edu.cn

  • 基金资助:
    国家自然科学基金(批准号: 21525418, 21474041, 91127031, 21504030)资助.

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).

摘要:

利用基于原子力显微镜的单分子力谱技术, 定量研究了独立状态下自组装单层膜中的单个硫醚-金相互作用强度, 并从单分子水平探讨了外界因素对硫-金配位键强度的影响. 结果表明, 硫醚分子以配位键形式与金基底结合; 与还原金表面相比, 氧化金表面能够加强硫-金作用强度; 另外, 溶剂对其硫-金配位键强度也产生影响.

关键词: 单硫醚-金配位相互作用, 配位键, 单分子力谱, 溶剂效应, 自组装膜

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

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