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电化学  2010 

铂电极上自组装铁原卟啉单分子层的表面增强振动光谱初探(英文)

, PP. 273-278

Keywords: 表面增强拉曼光谱,表面增强红外光谱,铁原卟啉,自组装单分子层,铂电极

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Abstract:

应用现场表面增强拉曼光谱和衰减全反射表面增强红外光谱初步研究了0.1mol·L-1HClO4溶液中Pt电极表面铁原卟啉(FePP)自组装单层的电化学和结构特性.以514nm波长为激发线,得到了增强因子约为40的粗糙Pt电极上FePP在不同电位下的表面增强拉曼光谱.分析0.5~-0.3V(SCE)区间内谱峰变化,得到近似的吸附等温式,由此可估算出Fe3+/Fe2+的式量电位大约为-0.2V.原位表面增强红外光谱的测试结果表明,FePP分子主要以斜立方式吸附在Pt膜电极表面,其中一个环外羧酸根与电极表面相接触,而另一羧酸基团以氢键与相邻的FePP分子相连.这样的吸附结构在-0.1~0.9V(SCE)的电位区间内并没有显著的变化.

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