物理化学学报 >> 2011, Vol. 27 >> Issue (03): 754-758.doi: 10.3866/PKU.WHXB20110313

材料物理化学 上一篇    

一种噻吩基双偶极半菁与普鲁士蓝的静电自组装薄膜

王志平1,2, 罗虹1, 高丽华3, 王科志1   

  1. 1. 北京师范大学化学学院, 北京 100875;
    2. 集宁师范学院, 内蒙古 集宁 012000;
    3. 北京工商大学化学与环境工程学院, 北京 100048
  • 收稿日期:2010-11-30 修回日期:2010-12-12 发布日期:2011-03-03
  • 通讯作者: 王科志 E-mail:kzwang@bnu.edu.cn
  • 基金资助:

    国家自然科学基金(20971016, 90922004, 20871011), 中央高校基本科研业务费专项基金, 北京市自然科学基金(2092011)和北京师范大学测试基金资助项目

Electrostatically Self-Assembled Films Prepared Using Bipolar Thiophene Hemicyanine and Prussian Blue

WANG Zhi-Ping1,2, LUO Hong1, GAO Li-Hua3, WANG Ke-Zhi1   

  1. 1. College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China;
    2. Jining Teachers College, Jining 012000, Inner Mongolia, P. R. China;
    3. School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China
  • Received:2010-11-30 Revised:2010-12-12 Published:2011-03-03
  • Contact: WANG Ke-Zhi E-mail:kzwang@bnu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20971016, 90922004, 20871011), Fundamental Research Funds for the Central Universities, Beijing Natural Science Foundation, China (2092011) and Measurements Fund of Beijing Normal University, China.

摘要:

通过交替沉积普鲁士蓝和一种含噻吩的半菁, 制备了一种新的无机-有机杂化静电自组装膜. 用紫外-可见吸收光谱、循环伏安技术和光电化学实验对薄膜进行了表征或光电性质研究. 376和698 nm处薄膜的吸光度随薄膜层数增加线性增加, 表明薄膜的沉积是均匀和可重复的. 薄膜中的普鲁士蓝具有良好的表面控制而非扩散控制的电化学活性, 膜的层数从1增加至5时, 阳极峰电流随膜层数增加而线性增加. 100 mW·cm-2的白光照射下, 薄膜产生稳定的阴极光电流, 随层数增加线性增长, 层数增加到4层时, 光电流达到最大值. 饱和甘汞电极为参比电极, -0.4 V 偏压下, 4层薄膜产生的光电流密度高达0.28 μA·cm-2.

关键词: 半菁, 自组装膜, 循环伏安, 紫外可见光谱, 噻吩, 光电化学性质

Abstract:

We successfully prepared a novel inorganic-organic hybrid electrostatically self-assembled multilayer film by alternately depositing Prussian blue (PB) and a thiophene-containing hemicyanine. The optical, electrochemical, and photoelectrochemical properties of the as-prepared films were studied by UV-visible absorption spectroscopy, cyclic voltammetry, and photoelectrochemical experiment. Linear increases in the absorbances at 376 and 698 nm with the number of deposited layers, up to at least 8 layers, indicated that film deposition was uniform and reproducible. The PB in the prepared films was found to occur surface-confined rather than diffusion-controlled redox reactions and the peak currents increased with an increase in the number of layers up to 5 layers. Upon irradiation with 100 mW·cm-2 white light the films exhibited stable and reproducible cathodic photocurrents, which increased as the number of layers increased up to 4 layers. A maximum photocurrent density of 0.28 μA·cm-2 was found for the four-layer film at a bias voltage of -0.4 V vs the saturated calomel electrode.

Key words: Hemicyanine, Self-assembled film, Cyclic voltammetry, UV-visible spectrum, Thiophene, Photoelectrochemical property

MSC2000: 

  • O646