Ruthenium–amine complexation for constructing self-assembled molecular films

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• 作者：Takahiro Moriguchi ; Kuniaki Murase ; Hiroyuki Sugimura
• 关键词：Self-assembled monolayer ; Silane molecules ; Ruthenium(III) ions ; Ruthenium(III) complexes
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2008
• 出版时间：15 May 2008
• 年：2008
• 卷：321
• 期：1-3
• 页码：94-98
• 全文大小：267 K

文摘

A redox active self-assembled monolayer consisting of ethylenediamine moieties coordinated to Ru^III ions was prepared through a vapor phase silane coupling of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPS) molecules onto a SiO₂/Si substrate, followed by complexation of Ru^III ions in an aqueous RuCl₃ solution. A similar SAM with 3-aminopropyltriethoxysilane did not provide surface Ru^III-complex, indicating that chelation ability plays a key role in immobilizing Ru^III ions at the surface. The Ru^III chelated AEAPS-SAM gave a couple of Ru^III/Ru^IV redox peaks at +1.0 and −0.1 V vs. Ag/AgCl (3 mol dm⁻³ NaCl).