Synthesis and Properties of Metalloporphyrin Monolayers and Stacked Multilayers Bound to an Electrode via Site Specific Axial Ligation to a Self-Assembled Monolayer
Synthesis and Properties of Metalloporphyrin Monolayers and Stacked Multilayers Bound to an Electrode via Site Specific Axial Ligation to a Self-Assembled Monolayer
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DOI：
10.1021/ja973528l
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发表时间：
1998-04
影响因子：
15
通讯作者：
D. Offord;S. B. Sachs;Matthew S. Ennis;T. Eberspacher;J. Griffin;and Christopher E. D. Chidsey;J. Collman
中科院分区：
文献类型：
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作者：
D. Offord;S. B. Sachs;Matthew S. Ennis;T. Eberspacher;J. Griffin;and Christopher E. D. Chidsey;J. Collman
提出了一种在自组装单分子膜(SAM)包覆的金电极表面固定金属卟啉的通用方法。结果表明，含咪唑端基吸附体的SAMS与一系列金属卟啉形成了键合态，包括双乙腈八乙基卟啉(II)，Ru(OEP)(CH3CN)2；双乙腈八乙基四氮杂卟啉Ru(II)，Ru(OETAP)(CH3CN)2；双乙腈tetra-(p-chlorophenyl)porphyrinatoruthenium(II)，Ru(Tp-ClpP)(CH3CN)2；双乙腈八乙基卟啉(II)，Os(OEP)(CH3CN)2；以及羰基四氮基卟啉(II)，Ru(TMP)(CO)。用光学椭偏仪、接触角测角仪、X射线光电子能谱、掠射角FT-IR光谱、透射可见光谱和电化学方法对SAM/金属卟啉薄膜进行了表征。结果表明，金属卟啉的化学吸附是通过金属中心的轴向配位体取代，使卟啉环平行于金属中心而实现的。
A general method has been developed for the immobilization of metalloporphyrins at a gold electrode surface coated with a self-assembled monolayer (SAM). SAMs containing imidazole-terminated adsorbates are shown to bind a series of metalloporphyrins, including bis-acetonitrile octaethylporphyrinatoruthenium(II), Ru(OEP)(CH3CN)2; bis-acetonitrile octaethyltetraazaporphyrinato ruthenium(II), Ru(OETAP)(CH3CN)2; bis-acetonitrile tetra-(p-chlorophenyl)porphyrinatoruthenium(II), Ru(Tp-ClPP)(CH3CN)2; bis-acetonitrile octaethylporphyrinatoosmium(II), Os(OEP)(CH3CN)2; and carbonyl meso-tetramesitylporphyrinatoruthenium(II), Ru(TMP)(CO). The SAM/metalloporphyrin films have been characterized by optical ellipsometry, contact angle goniometry, X-ray photoelectron spectroscopy, grazing angle FT-IR spectroscopy, transmission visible spectroscopy, and electrochemistry. The results indicate that the metalloporphyrins are chemisorbed via axial ligand substitution of the metal center with the porphyrin ring parallel to the...