物理化学学报 >> 2010, Vol. 26 >> Issue (07): 1893-1897.doi: 10.3866/PKU.WHXB20100704

催化和表面结构 上一篇    下一篇

利用给体-π-受体分子模板在Au(111)电极表面构筑富勒烯带状结构

严会娟, 王栋, 温国永, 张德清, 万立骏   

  1. 中国科学院化学研究所, 分子纳米结构与纳米技术院重点实验室, 北京分子科学国家实验室, 北京 100190
  • 收稿日期:2009-12-16 修回日期:2010-02-03 发布日期:2010-07-02
  • 通讯作者: 张德清, 万立骏 E-mail:dqzhang@iccas.ac.cn; wanlijun@iccas.ac.cn

Fullerene Band-Like Assembly Induced by a Donor-π-Acceptor Molecular Template on Au(111) Electrode Surface

YAN Hui-Juan, WANG Dong, WEN Guo-Yong, ZHANG De-Qing, WAN Li-Jun   

  1. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2009-12-16 Revised:2010-02-03 Published:2010-07-02
  • Contact: ZHANG De-Qing, WAN Li-Jun E-mail:dqzhang@iccas.ac.cn; wanlijun@iccas.ac.cn

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摘要：

富勒烯与功能分子之间的电荷作用已经被广泛应用于功能性器件的构筑中. 这些功能器件的性能与电极表面的薄膜排布结构有着密切关系. 因此, 研究电极表面的富勒烯和功能分子的组装结构对这些器件的构筑和功能的发挥有着重要意义. 本文利用电化学扫描隧道显微镜技术, 在HClO4溶液中系统研究了C60分子与有机电子给体-π-受体分子C16H33O-I3CNQ[Z-β-(5-hexadecyloxy-1,3,3-trimethyl-2-indolium)-α-cyano-4-styryl dicyanomethanide]在Au(111)电极表面的二维组装结构. 研究发现: C16H33O-I3CNQ分子在Au(111)电极表面组装形成具有短程有序性的条陇状结构; 而C60分子在C16H33O-I3CNQ模板之上组装形成了带状结构. C60分子带状结构的形成方向受到了C16H33O-I3CNQ分子中电子给体-π-受体部分排列结构的影响. C60分子与C16H33O-I3CNQ分子之间的π-π堆积作用和电荷转移作用对这种带状结构的形成有着密切关系. 这一结果为利用富勒烯和功能分子之间的作用构筑功能器件提供了一种新的制备方法.

关键词: 自组装, 富勒烯, 给体-π-受体, 扫描隧道显微镜, 带状组装结构

Abstract:

Fullerene has been extensively used in functional devices requiring electron transfer between fullerene and functional molecules. The investigation of multi-component assembly structures of fullerene and functional molecules on electrode surfaces will benefit the fabrication of fullerene based nanodevices as well as the study of their fundamental physical and chemical properties. The two dimensional (2D) self-assembly structure of C60 and the donor-π-acceptor molecule Z-β-(5-hexadecyloxy-1,3,3-trimethyl-2-indolium)-α-cyano-4-styryl dicyanomethanide (C16H33O-I3CNQ) on an Au(111) electrode surface was investigated by electrochemical scanning tunneling microscopy (ECSTM) in HClO4. The C16H33O-I3CNQ molecules self-organized into a short-ranged ordered structure on the Au(111) surface. C60 molecules formed band-like assembly structures templated by the C16H33O-I3CNQ adlayer. The orientation of the C60 band structure is controlled by the arrangement of the donor-π-acceptor moieties. π-π stacking interactions and charge transfer between C60 and C16H33O-I3CNQ may contribute to the formation of the C60 band-like assembly. The results reported here are expected to provide a new approach for the fabrication of fullerene films and functional devices.

Key words: Self-assembly, Fullerene, Donor-π-acceptor, Scanning tunneling microscopy, Band-like assembly