在含有Fe (III) 离子的聚烯酸水溶液中,通过光切换的Redox响应的凝-sol/sol-gel过渡
Fei Peng1, Guangzhao Li, Xinxing Liu
1Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China.
Journal of the American Chemical Society
|November 13, 2008
概括
这项研究表明,在使用铁酸复合体的多烯酸系统中,凝-溶/溶-凝过渡是可逆的. 这种由氧化还原变化和光驱动的过渡是通过铁离子在视觉上表示的,并且可以用足够的酸重复.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
背景情况:
- 开发响应刺激的材料对于先进的应用至关重要.
- 控制聚合物网络的形成和溶解是一个关键的挑战.
- 铁复合物为材料设计提供可调节的氧化还原特性.
研究的目的:
- 为了研究氧化还原反应的凝-溶/溶-凝过渡在水性多酸) 系统.
- 为了利用Fe (III) - 酸盐复合物用于光诱导的可逆相变.
- 建立一个色彩指示和可重复的过渡机制.
主要方法:
- 制备一个含有Fe (III) -酸复合物的水性多烯酸系统.
- 通过光还原和氧化诱导氧化还原状态变化 (Fe (III) /Fe (II)).
- 凝-sol/sol-gel过渡的观察和描述.
- 评估过渡的可逆性和可重复性.
主要成果:
- 在poly (?? 烯酸) /Fe (III) -酸盐系统中实现了可逆的凝-溶液/溶液-凝过渡.
- 证明过渡是可以通过光来切换铁离子的氧化还原状态来控制的.
- 通过Fe (III) 离子进行过渡的观察到的色谱指示.
- 证实了在存在足够的酸的情况下,过渡的可重复性.
结论:
- 在水性聚合物系统中,Fe (III) - 酸盐复合物可实现对氧化回应,光控制的凝-溶/溶-凝过渡.
- 该系统具有可逆和可重复的相位行为,具有视觉色彩反.
- 这项工作为设计具有可调节性质的智能水凝提供了基础.
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