Potential dependent change in local structure of ferrocenyl-terminated molecular islands by electrochemical frequency modulation atomic force microscopy
Potential dependent change in local structure of ferrocenyl-terminated molecular islands by electrochemical frequency modulation atomic force microscopy
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DOI：
10.1116/1.3316501
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发表时间：
2010-05
期刊：
影响因子：
--
通讯作者：
Kenichi Umeda;K. Fukui
中科院分区：
文献类型：
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作者：
Kenichi Umeda;K. Fukui
在0.1M HClO 4水溶液中，采用电化学频率调制原子力显微镜研究了二茂铁十一烷硫醇（FcC 11 H22 SH）岛嵌入正庚烷硫醇（C7 H15 SH）自组装单层基质中在Au（111）表面的电活性.从Fc 0氧化为Fc+后，在拓扑图中获得Fc岛上局部结构变化的信号，这是一个可逆过程;然而，与先前研究的嵌入C10 H21 SH中的Fc C11 H22 SH岛的情况相比，变化的幅度远小于预期。源自周围基质分子的不同分子长度的Fc岛的结构的不同自由度可能提供两个系统之间的明显对比。
Electroactive ferrocenylundecanethiol (FcC11H22SH) islands embedded in a n-heptanethiol (C7H15SH) self-assembled monolayer matrix on Au(111) were studied under potential control in 0.1M HClO4 aqueous solution using electrochemical frequency modulation atomic force microscopy. Signal of local structural change on the Fc islands upon oxidation from Fc0 to Fc+ was obtained in topography as a reversible process; however, the magnitude of the change was far less than expected in contrast to the case of the previous study for FcC11H22SH islands embedded in C10H21SH. Different degrees of freedom for the structures of the Fc islands originating from different molecular lengths for surrounding matrix molecules perhaps provide the distinct contrast between the two systems.