Redox-Active Catechol-Functionalized Molecular Rods: Suitable Protection Groups and Single-Molecule Transport Investigations
作者:Nicolas Weibel、Alfred Błaszczyk、Carsten von Hänisch、Marcel Mayor、Ilya Pobelov、Thomas Wandlowski、Fang Chen、Nongjian Tao
DOI:10.1002/ejoc.200700810
日期:2008.1
acetyl-protected sulfur groups is reported. Various protecting groups for the catechol moiety were investigated and protected precursors 14–18 were synthesized. In particular, ethyl orthoformate 17 can be easily and selectively deprotected in mild acidic conditions ruling out the need for a strong Lewis acid like boron tribromide. The redox activity of 1 was confirmed by cyclic voltammetric investigations
报道了包含中心氧化还原活性单元和两个末端乙酰基保护的硫基团的分子棒 1 的合成。研究了儿茶酚部分的各种保护基团,并合成了受保护的前体 14-18。特别是,原甲酸乙酯 17 可以在温和的酸性条件下轻松且选择性地脱保护,从而无需使用强路易斯酸(如三溴化硼)。通过循环伏安法研究证实了 1 的氧化还原活性。金-分子-金连接由二甲基保护棒 18 形成。使用该分子棒进行的单分子传输研究显示一组三个单结电导值在两个数量级上变化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)