化学学报 ›› 2004, Vol. 62 ›› Issue (22): 2213-2217. 上一篇    下一篇

研究论文

金属富勒烯[Dy@C82(I)] 膜的电化学研究

范楼珍1, 吴月芹1, 杨尚峰2, 杨世和2   

  1. 1. 北京师范大学化学系, 北京, 100875;
    2. 香港科技大学化学系, 香港
  • 收稿日期:2004-04-22 修回日期:2004-07-02 出版日期:2004-11-28 发布日期:2014-02-17
  • 通讯作者: 范楼珍,E-mail:lzfan@bnu.edu.cn E-mail:lzfan@bnu.edu.cn

Electrochemical Study on Metallofullerene [Dy@C82(Ⅰ)] Films

FAN Lou-Zhen1, WU Yue-Qin1, YANG Shang-Feng2, YANG Shi-He2   

  1. 1. Department of Chemistry, Beijing Normal University, Beijing 100875;
    2. Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
  • Received:2004-04-22 Revised:2004-07-02 Online:2004-11-28 Published:2014-02-17

研究并对比了金属富勒烯Dy@C82的主要异构体Dy@C82(I)固体膜在有机溶剂乙腈及水溶液中的电化学性质.在乙腈溶液中,Dy@C82(I)膜的电化学行为不同于其溶于有机溶剂中的电化学行为,前两个还原峰与其对应的再氧化峰之间存在大的分裂.但是,经过还原及再氧化后的Dy@C82(I)膜却存在一对对称性很好的氧化及再还原峰.解释为经过还原后的Dy@C82(I)膜的结构有利于进一步氧化,而不需要结构重排;在水溶液中,Dy@C82(I)膜的电化学行为不同于其在乙腈溶液中,却类似于其有机溶液在Pt电极上的电化学行为,出现了对称性很好的三对还原峰及一对氧化峰.在水溶液中,Dy@-C82(I)的前三价负离子及一价正离子是稳定的.利用紫外-可见-近红外(UV-Vis-NIR)光谱及扫描电镜(SEM)等技术对膜的性质及表面形貌等进行了表征.

关键词: 金属富勒烯, Dy@C82(I)膜, 电化学

The electrochemical properties of the major isomer of Dy@C82[Dy@C82(I)] films have been studied in organic and aqueous solutions. In acetonitrile solution, the electrochemical behavior of Dy@C82(I) film is different from that of Dy@C82(I) dissolved in organic solution. Large splittings between reduction and reoxidation waves for the first and the second electron-transfer reactions were observed. However, a pair of reversible oxidation and rereduction waves was obtained after the reoxidation of a reduced film, which is interpreted as the favorable structure after reduction of the film and no structural reorganization was needed. In aqueous solution, the electrochemical properties of Dy@C82(I) film are similar with those of Dy@C82(I) dissolved in organic solutions, where the first three reversible reduction and reoxidation waves and the first oxidation and rereduction waves were obtained. In water, Dy@C82(I)-, Dy@C82(I)2-, Dy@C82(I)3- and Dy@C82(I)+ were found to be stable. The characteristic of this film was also uncovered by UV-Vis-NIR spectra and scanning electron microscopy (SEM), etc.

Key words: metallofullerene, Dy@C82(I)film, electrochemistry