物理化学学报 >> 2001, Vol. 17 >> Issue (03): 229-233.doi: 10.3866/PKU.WHXB20010308

研究简报 上一篇    下一篇

聚次甲基蓝膜的生长及性质

刘金翠;穆绍林;李永舫   

  1. 扬州大学化学系,扬州 225002; 中国科学院化学研究所,北京 100080
  • 收稿日期:2000-06-06 修回日期:2000-08-14 发布日期:2001-03-15
  • 通讯作者: 穆绍林 E-mail:slmu@yzu.edu.cn

Growth of Poly(methylene blue) Film and Properties of the Film

Liu Jin-Cui;Mu Shao-Lin;Li Yong-Fang   

  1. Department of Chemistry, School of Sciences, Yangzhou University,Shouxi Lake Ca mpus, Yangzhou 225002;Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
  • Received:2000-06-06 Revised:2000-08-14 Published:2001-03-15
  • Contact: Mu Shao-Lin E-mail:slmu@yzu.edu.cn

关键词: 聚次甲基蓝, 现场光谱电化学, 旋转环-盘电极, XPS, 交流阻抗

Abstract: The in situ spectroelectrochemical experiment shows that an absorption peak at 580.5 nm attributable to poly(methylene blue) grows slowly at the begin ning of the electrolysis of methylene blue, and then this peak grows more quickl y. The visible spectra prove that there are two absorption peaks at 580.5 and 6 90.2 nm respectively for the mixture solution after electrolysis. The former on e indicates that poly(methylene blue)polymerized on the ITO electrode is partly soluble; the latter one is attributed to a watersoluble polymer since it compl etely dissolves in the aqueous solution. The result from the rotating ringdisk electrode identifies that an intermediate is produced at the disk electrode, wh ich is collected at the ring electrode. The ring current increases with decreasi ng the ring potential and with increasing the rotation rate. Thus, the intermedi ate is a species carrying a positive charge and not too stable.The result from t he XPS experiment shows that the anions can be doped into poly(methylene blue) f ilm and dedoped from it during oxidation and reduction processes. The results fr om the impedance experiment indicate that the charge transfer impedance of poly( methylene blue) decreases with decreasing potential.

Key words: Poly(methylene blue), In situ spectroelectrochemistry, RRDE, XPS,  Impedancespectra