Synthesis and characterization of benzenesulfonate derivatives doped poly(3,4-ethylenedioxythiophene) films and their application in electrocatalysis

详细信息    查看全文

• 作者：Tao Nie^a ; ^b ; Jing Leng^a ; Ling Bai^a ; Limin Lu^a ; ^{lulimin816@hotmail.com" class="auth_mail} ; Jingkun Xu^b ; ^{xujingkun@tsinghua.org.cn" class="auth_mail} ; ^{xujingkun1971@163.com" class="auth_mail} ; Kaixin Zhang^b
• 关键词：Poly(3 ; 4-ethylenedioxythiophene) ; Simultaneous determination ; Doping ions ; Electrodeposition ; Vitamin B
• 刊名：Synthetic Metals
• 出版年：March, 2014
• 年：2014
• 卷：189
• 期：Complete
• 页码：161-172
• 全文大小：2606 K

文摘

The dopant anion in poly(3,4-ethylenedioxythiophene) (PEDOT) plays a critical role in determining the physical and chemical properties of these conducting polymers. In this paper, six kinds of benzenesulfonate derivatives, including benzenesulfonate (BS), p-methylbenzene-sulfonate (p-MBS), p-aminobenzenesulfonate (p-ABS), p-hydroxybenzene-sulfonate (p-HBS), m-carboxylbenzenesulfonate (m-CBS) and m-nitrobenzenesulfonate (m-NBS) were used to dope PEDOT via a facile electrochemical deposition strategy. The presence of the dopants in the conducting polymer matrix was verified by Fourier transform infrared spectroscopy (FTIR) and ultraviolet spectrum (UV/vis) and the morphologies of the resulting benzenesulfonate derivatives doped PEDOT films were analyzed by scanning electron microscopy (SEM). The electrocatalytic activities of these doped PEDOT films toward VB₂, VB₉ and VC were investigated by cyclic voltammetry (CV). Among them, the PEDOT/p-ABS^{鈭?/sup> film shows a higher catalytic peak currents, which might be ascribed to the large surface area of nanostructured PEDOT/p-ABS鈭?/sup> film, and the strong interaction between NH group doped in PEDOT/p-ABS鈭?/sup> film and VB₂, VB₉ and VC via hydrogen bonding. Then the PEDOT/p-ABS鈭?/sup> film modified glass carbon electrode (PEDOT/p-ABS鈭?/sup>/GCE) was utilized as an electrochemical sensor for the simultaneous detection of these vitamins, and the linear ranges for VB₂, VB₉ and VC are 0.05-200 渭M, 0.5-1000 渭M and 1-1500 渭M with limits of detection of 0.015 渭M, 0.12 渭M and 0.46 渭M, respectively, (S/N = 3). Moreover, the modified electrode was successfully employed for the determination of VB₂, VB₉ and VC in human blood plasma with satisfactory results.}