A new route to synthesize high degree polythiophene in a room temperature melt medium
A new route to synthesize high degree polythiophene in a room temperature melt medium
复制标题
DOI：
10.1016/j.synthmet.2005.08.003
复制
发表时间：
2005-10-15
期刊：
影响因子：
4.4
通讯作者：
Trivedi, DC
中科院分区：
文献类型：
--
作者：
Geetha, S;Trivedi, DC
由于自由基阳离子的随机成核和溶剂化而产生交联/无序聚合物，导电聚合物遭受折叠和扭结，因此采用室温熔融介质中的无溶剂电化学聚合来产生具有高电子电导率的高度聚合物。在氯铝酸盐室温熔融介质中，使用循环伏安法或恒电流模式在Platimm/ITO基底上进行噻吩的电聚合，以获得红棕色的自支撑膜，其可以在最少10个循环后从电极表面剥离。电导率约为10（2）S/cm。从IR研究计算聚合度为约44。电位阶跃技术证实了聚合物的层状结构有利于聚合度的提高。从紫外光谱的电荷载流子被发现是双极化子。通过SEM和XRD研究发现薄膜的形貌为结晶。掺杂样品的电容阻抗特性从阻抗谱解释。(C)2005 Elsevier B. V.保留所有权利。
Conducting polymers suffer from folds and kinks because of random nucleation and solvation of a free radical cation to yield a cross linked/disordered polymer and therefore a solvent free electrochemical polymerization in a room temperature melt medium is adopted to yield a high degree polymer with high electronic conductivity. Electropolymerization of thiophene was performed on platimm/ITO substrates using cyclic voltametry or galvenostatic mode in chloroaluminate room temperature melt medium to obtain a reddish brown free standing film which can be peeled off from the electrode surface after a minimum of 10 cycles. The conductivity was found to be around 10(2) S/cm. The degree of polymerization was calculated to be around 44 from IR studies. A layered structure supportive for high degree of polymerization was witnessed from potential step technique. From UV spectra the charge carriers were found to be bipolarons. The morphology of the film was found to be crystalline from SEM and XRD studies. Capacitative impedance properties for doped samples were interpreted from impedance spectroscopy. (C) 2005 Elsevier B.V. All rights reserved.