| 聚苯胺的电化学现场ESR-电导同步测量 |
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| 引用本文： | 庄林,周琴,陆君涛. 聚苯胺的电化学现场ESR-电导同步测量[J]. 电化学, 2000, 6(1): 10-16 |
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| 作者姓名： | 庄林 周琴 陆君涛 |
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| 作者单位： | 武汉大学!化学与环境科学学院!湖北武汉430072,武汉大学!化学与环境科学学院!湖北武汉430072,武汉大学!化学与环境科学学院!湖北武汉430072 |
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| 基金项目： | 国家自然科学基金!资助项目 (2 990 30 0 8) |
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| 摘 要： | 本论文工作通过设计新型的电解池 ,首次实现了导电聚合物的电化学现场ESR_电导同步测量 .从获得的聚苯胺ESR信号及膜电阻随电极电势变化的精细图象看出 ,极化子晶格的形成与消亡决定了聚苯胺的导电行为 .从不同电势下聚苯胺的ESR饱和行为也得到Curie自旋与Pauli自旋相互转化的新证据 .
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| 关 键 词： | 导电聚合物 电子自旋共振 聚苯胺 导电机理 |
| 文章编号： | 1006-3471(2000)01-0010-07 |
| 收稿时间： | 2000-02-28 |
| 修稿时间： | 1999-11-01 |
In-situ Simultaneous ESR and Conductivity Measurements for Polyaniline |
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| ZHUANG Lin,ZHOU Qing,LU Jun-tao. In-situ Simultaneous ESR and Conductivity Measurements for Polyaniline[J]. Electrochemistry, 2000, 6(1): 10-16 |
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| Authors: | ZHUANG Lin ZHOU Qing LU Jun-tao |
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| Affiliation: | ZHUANG Lin,ZHOU Qing,LU Jun-tao(College of Chemistry and Environmental Science,Wuhan University,Wuhan 430072,China) |
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| Abstract: | With a new cell design, simultaneous electrochemical ESR and conductance measurements were realized for the first time. The in_situ cell consisted of a dual working electrode, a counter electrode and a reference electrode accommodated in a capillary of 1mm diameter. The dual working electrode was composed of two closely spaced Pt electrodes: a Pt disk electrode(0.5 mm diameter)sealed in a thin glass tube and a Pt layer deposited on the outside wall of the glass tube.The two working electrodes were separated by the glass gap about 20 μm thick. Two potentiostats were used to control electrode potential and maintain 10 mV potential difference between the two working electrodes. The conductivity of the polyaniline was deduced from the current passing through the polymer across the glass gap. With the new technique, an unprecedented detailed picture was obtained revealing the potential dependences of conductivity and ESR behaviors, including ESR intensity, lineshape, and saturation. Experimental results showed that the conduction mechanism could be well interpreted within the framework of the polaron lattice model. The ESR saturation data also provided a new experimental evidence for the transformation between Curie spins and Pauli spins. |
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| Keywords: | Conducting polymer Electron spin resonance Polyaniline Conduction mechanism |
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