DHP和SWCNTs促进[Ru(bpy)2tatp]3+/2+在ITO上的电化学组装

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (9): 1824.

DHP和SWCNTs促进[Ru(bpy)₂tatp]^3+/2+在ITO上的电化学组装

郭清宇, 洪伟, 许娟, 李红

华南师范大学化学与环境学院, 广州 510006

收稿日期:2008-10-10 出版日期:2009-09-10 发布日期:2009-09-10
通讯作者: 李红, 女, 博士, 教授, 博士生导师, 主要从事生物电化学方面的研究. E-mail: lihong@scnu.edu.cn
基金资助:
广东省教育厅自然科学基金(批准号: Z03020)和广州市科技计划项目(批准号: 2004J1-C0091)资助.

Electrochemical Assembly of [Ru(bpy)₂tatp]^3+/2+ Prompted by DHP and SWCNTs on an ITO Electrode

GUO Qing-Yu, HONG Wei, XU Juan, LI Hong^*

School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China

Received:2008-10-10 Online:2009-09-10 Published:2009-09-10
Contact: LI Hong. E-mail: lihong@scnu.edu.cn
Supported by:
广东省教育厅自然科学基金(批准号: Z03020)和广州市科技计划项目(批准号: 2004J1-C0091)资助.

摘要/Abstract

摘要：

应用循环伏安法和微分脉冲伏安法研究了[Ru(bpy)₂tatp]^3+/2+(bpy=2,2′-联吡啶, tatp=1,4,8,9-四氮三联苯)在ITO表面上的电化学组装及双十六烷基磷酸盐(DHP)和单壁碳纳米管(SWCNTs)对其组装效果的影响. 研究结果表明, [Ru(bpy)₂tatp]²⁺在ITO电极上1.057 V(vs. Ag/AgCl)电位下呈现出清晰的扩散控制峰. 随着连续伏安扫描次数的增多, 微分脉冲伏安图逐渐呈现出明显的吸附控制峰. 当DHP浓度在0.05~0.22 mmol/L区间内时, 不管有无SWCNTs存在, DHP均能增强[Ru(bpy)₂tatp]²⁺在缓冲溶液中的扩散系数和促进其在ITO上的电化学组装, 而SWCNTs在其中起减弱作用. 讨论了DHP和SWCNTs参与的[Ru(bpy)₂tatp]^3+/2+在ITO上的电化学组装机理.

关键词: 多吡啶钌(Ⅱ)配合物; 双十六烷基磷酸盐; 单壁碳纳米管; 电化学组装

Abstract:

The electrochemical assembly of [Ru(bpy)₂tatp]^3+/2+(bpy=2,2′-bipypyridine, tatp=1,4,8,9-tetra-aza-triphenylene) on an ITO electrode with the participation of dihexadecyl phosphate(DHP) and single-walled carbon nanotubes(SWCNTs) was investigated by cyclic voltammetry and differential pulse voltammetry. It is found that a well-defined peak appears at the formal potential of 1.075 V(vs. Ag/AgCl) controlled by the diffusion process. And another adsorption-controlled peak appears gradually on the ITO electrode with increasing progressively voltammetric sweeping numbers. DHP in the absence or presence of SWCNTs can enhance the diffusion coefficient of [Ru(bpy)₂tatp]²⁺ in buffer solution and prompt its electrochemical assembly on the ITO electrode in the DHP concentration range from 0.05 to 0.22 mmol/L. However, SWCNTs dispersed with DHP can weaken the DHP-enhanced assembly. In addition, the assembled mechanism of [Ru(bpy)₂tatp]^3+/2+ mediated by DHP and SWCNTs on the ITO surface is discussed in detail. The results provide a novel way for better fabricating redox molecule devices.

Key words: Polypyridyl ruthenium(Ⅱ) complex; Dihexadecyl phosphate; Single-walled carbon nanotube; Electrochemical assembly

TrendMD:

郭清宇, 洪伟, 许娟, 李红. DHP和SWCNTs促进[Ru(bpy)₂tatp]^3+/2+在ITO上的电化学组装. 高等学校化学学报, 2009, 30(9): 1824.

GUO Qing-Yu, HONG Wei, XU Juan, LI Hong*. Electrochemical Assembly of [Ru(bpy)₂tatp]^3+/2+ Prompted by DHP and SWCNTs on an ITO Electrode. Chem. J. Chinese Universities, 2009, 30(9): 1824.

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DHP和SWCNTs促进[Ru(bpy)₂tatp]^3+/2+在ITO上的电化学组装

Electrochemical Assembly of [Ru(bpy)₂tatp]^3+/2+ Prompted by DHP and SWCNTs on an ITO Electrode

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