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首页> 外文期刊>Journal of Applied Polymer Science >XPS and ESR Studies of Electrochemically Synthesized Polycarbazole Post-Doped with lodine
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XPS and ESR Studies of Electrochemically Synthesized Polycarbazole Post-Doped with lodine

机译：碘化学掺杂后的电化学合成聚咔唑的XPS和ESR研究

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摘要

Polycarbazole powders obtained by electrochemical oxidation of carbazole thin films or of carbazole in solution in the electrolyte have been post-doped with iodine and characterized by room temperature electrical conductivity,X-ray photoelectron spectroscopy (XPS),and electron spin resonance (ESR).Similar results are obtained with polymers saturated with iodine at room temperature after 6 weeks and with polymers doped at 383 K for 24 h.The polymers obtained from carbazole thin films have a higher electrical conductivity (#sigma#-10~-4 #OMEGA#~-1 cm~-1) and a higher spin density (9/9 10~21 spins mol~-1 g~-1),which corresponds to 71 atom % of ionic iodine.The polymer radicals are located on the nitrogen,and the percentage of N~+ is 40 atom % The electrical conductivity of the polymers obtained from carbazole in solution in the electrolyte is two order of magnitude smaller.The percentage of N~+ is only 25 atom % with an ionic iodine percentage of 13 atom %.So,the most important parameter is not the iodine percentage introduced after doping into the polymers but the percentage of ionic iodine present in the polymers.The differences that are put in evidence can be explained by a better polymerization efficiency of the carbazole when it is deposited on thin film form by vacuum evaporation before electrochemical oxydation.
机译：通过对咔唑薄膜或电解质溶液中的咔唑进行电化学氧化而制得的聚咔唑粉已用碘进行后掺杂，并具有室温电导率，X射线光电子能谱（XPS）和电子自旋共振（ESR）的特征。用六周后在室温下用碘饱和的聚合物和在383 K下掺杂24 h的聚合物获得相似的结果。从咔唑薄膜获得的聚合物具有更高的电导率（＃sigma＃-10〜-4＃OMEGA＃ 〜-1 cm〜-1）和更高的自旋密度（9/9 10〜21自旋mol〜-1 g〜-1），相当于离子碘的71原子％。聚合物自由基位于氮上， N〜+的百分比为40原子％电解质溶液中咔唑制得的聚合物的电导率小两个数量级.N〜+的百分比仅为25原子％，离子碘百分比为13因此，最重要的参数不是掺杂到聚合物中后引入的碘百分比，而是聚合物中存在的离子碘的百分比。咔唑通过真空沉积成薄膜形式时，其聚合效率更高，可以证明存在差异。在电化学氧化之前蒸发。

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