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As the electron donating ability of arylamine enhances with the increasing conjugation degree,the direc-tion of charge rearrangement is supposed to be from the N (in TPA) to adjacent C atoms, resulting in electron-rich character-istic of C and downward BE positions. The intensified shake-up satellite is attributed to the enhanced delocalization of the π electron associated with the stronger charge transfer transition after grinding. As TPA is electroactive, we investigated the electrochemical characteristics of DMCS-TPA, and observed the intriguing electrochromic behaviour from its homopolymer. DMCS-TPA can be successfully polymerized via electro-synthesis, which is an effective approach for preparing cross-linked films directly onto a conducting substrate. Fig. 7(a) shows the cycle voltam-metry polymerization spectra of DMCS-TPA on the ITO elec-trode. The CV traces show two oxidation peaks at 0.96 and 1.32V and corresponding reduction peaks at 0.86 V and 1.04 V,respectively. Under repeated scanning, the oxidation currents at 0.96 V gradually raised, suggesting the growth of the conducting polymer film. The slight increase in the peak potential is attributed to the increase of resistance as the film thickening.The surface morphology of the film prepared through constant potential polymerization is depicted in the inset of Fig. 7(a). |
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糖太甜521: 金币+8, 翻译EPI+1, ★★★★★最佳答案 2014-10-18 09:31:48
糖太甜521: 金币+8, 翻译EPI+1, ★★★★★最佳答案 2014-10-18 09:31:48
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随着共轭程度芳基胺的供电子能力也增强，电荷重排的方向应是从N（在TPA）到相邻的C原子，从而使C具有富含电子的特性并朝向下的BE位置。加强的振激卫星峰归因于与研磨后强电荷转移相关联的π电子的离域增强。 由于TPA的电活性，我们研究了DMCS-TPA的电化学特性，并从它的同聚体观察到有趣的电致变色特性。DMCS-TPA能够通过电合成成功地聚合而成，这是一种制备薄膜直接交联到导电基体上的有效方法。图7（a）显示了DMCS-TPA的在ITO电极上的循环伏安法聚合谱。该CV（循环伏安法）的迹线分别显示了在0.96和1.32V的两个氧化峰和在0.86 V和1.04 V的还原峰。重复扫描扫描时，在0.96伏的氧化电流逐渐升高，表明聚合膜的导电性性增高。峰电位的轻微增加归因于虽膜厚度增加而使电阻增加。通过恒电位聚合制得的膜的表面形态见于图7（a）中的插图. |
2楼2014-10-17 02:38:15