自支撑柔性聚(5-吲哚硼酸)膜的电化学合成及表征  

Electrochemical Synthesis and Characterization of Self-supporting Flexible Poly(5-indolylboronic acid)Film

作　　者：周卫强[1] 康欢 晁诗杏 徐景坤[1] Wei-qiang Zhou;Huan Kang;Shi-xing Chao;Jing-kun Xu(Flexible Electronics Innovation Institute,Jiangxi Science and Technology Normal University,Nanchang 330013)

机构地区：[1]江西科技师范大学柔性电子创新研究院,南昌330013

出　　处：《高分子学报》2022年第3期273-278,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号51862011,52174278);江西省主要学科学术和技术带头人领军人才(项目号20204BCJL22040);江西省教育厅重点项目(项目号GJJ201108)资助。

摘　　要：在三氟化硼乙醚/乙腈的混合体系中,5-吲哚硼酸的电化学氧化可以获得导电率为9×10^(-4) S·cm^(-1)的自支撑柔性聚(5-吲哚硼酸)膜.5-吲哚硼酸在80%的三氟化硼乙醚/乙腈溶液中的起始氧化电位约为0.80 V.红外光谱确定了5-吲哚硼酸的聚合位点在C_(2)和C_(3)位上.紫外可见光谱测试结果表明聚(5-吲哚硼酸)的能隙约为2.48 eV.制备的聚(5-吲哚硼酸)膜具有良好的电化学性能和热稳定性能.Flexible conducting polymers have potential applications in future wearable or portable electronics.However,conducting polymers with rigid structure were difficultly prepared into robust flexible films,especially,their electrochemical instability is a critical defect.Therefore,the preparation of high-quality flexible conducting polymer films is both meaningful and challenging.Here,a self-supporting flexible poly(5-indolylboronic acid)(PIn BA)film with an electrical conductivity of 9×10^(-4) S·cm^(-1) is facilely prepared by direct anodic oxidation of 5-indolylboronic acid in the mixed system of 80%boron trifluoride diethyl etherate and acetonitrile.The initial oxidation potential of 5-indolylboronic acid in 80%boron trifluoride diethyl etherate-acetonitrile solution is about0.80 V versus Ag/Ag Cl,lower than that determined in acetonitrile system(0.93 V versus Ag/AgCl).The structure,electrochemical performance and thermal stability of PIn BA film are investigated by Ultraviolet-visible(UV-Vis)spectroscopy,Fourier transform infrared(FTIR)spectroscopy,scanning electron microscopy,cyclic voltammetry and thermogravimetric analysis.The results of FTIR spectra confirm that the polymerization sites of 5-indolylboronic acid are at the C_(2) and C_(3) positions.The UV-Vis spectrum proves that the band gap of PIn BA is 2.48 eV.And as-prepared PIn BA film has excellent electrochemical performance,high thermal stability and good mechanical properties.These results indicate that the PIn BA film is a promising electrode material for flexible electronics such as electrochemical sensors,supercapacitors and thermoelectrics.

关 键 词：导电聚合物 5-吲哚硼酸 电聚合 柔性膜 

分 类 号：TQ317[化学工程—高聚物工业] TB383.2[一般工业技术—材料科学与工程]