物理化学学报 >> 1989, Vol. 5 >> Issue (03): 270-273.doi: 10.3866/PKU.WHXB19890305

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聚邻甲苯胺的合成及物理化学性质

穆绍林; 陆友玲; 钱必东   

  1. 扬州师范学院化学系
  • 收稿日期:1988-12-29 修回日期:1989-03-03 发布日期:1989-06-15
  • 通讯作者: 穆绍林

SYNTHESIS OF POLY-o-METHYLANILINE AND ITS PHYSICOCHEMICAL CHARACTERISTICS

Mu Shaolin*; Lu Youling; Qian Bidong   

  1. Departmeat of Chemistry; Yangzhou Teacher's college
  • Received:1988-12-29 Revised:1989-03-03 Published:1989-06-15
  • Contact: Mu Shaolin

Abstract:

The electrolyte solution consisted of 1.5 mol.L~(-1) HCl and 0.2 mol.L~(-1) o-methylaniline was electrolysed at a constant potential by using two pieces of platinum as electrodes, the anodic potential was controlled at 0.4V(vs. SCE). A blue and cohesive film was formed at the anodic electrode, it was poly-o-methylaniline(poly-o-toluidine). Its ESR spectrum was characterized as a single narrowline. When a fresh synthesized poly-o-methylaniline(0.35V) was reduced to -0.22 V(vs.SCE), its conductivity decreased from 5.8×10~(-3) to 3.5×10~(-5) S.cm~(-1), and its peak-to-peak linewidth ΔH_(p-p) increased from 1.94 G to 3.10 G. The film colour changed with the pH values of the solution and its electrode potentials. There are two anodic and two cathodic peaks on the cyclic voltammograms of poly-o-methyl-aniline in the 1.5 mol.L~(-1) ZnCl_2 of pH 1.69, the anodic and cathodic peaks at more positive potentials shift toward the negative potentials with increasing pH values. At pH 3.89, only one anodic peak and one cathodic peak on cyclic voltammograms are remained. The peak potentials and peak currents of poly-o-methylaniline in the different pH values are independent of cycles.