Quardokus Rebecca C, Wasio Natalie A, Brown Ryan D, Christie John A, Henderson Kenneth W, Forrest Ryan P, Lent Craig S, Corcelli Steven A, Kandel S Alex
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670, USA.
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556-5637, USA.
J Chem Phys. 2015 Mar 14;142(10):101927. doi: 10.1063/1.4909517.
Low-temperature scanning tunneling microscopy is used to observe self-assembled structures of ferrocenedicarboxylic acid (Fc(COOH)2) on the Au(111) surface. The surface is prepared by pulse-deposition of Fc(COOH)2 dissolved in methanol, and the solvent is evaporated before imaging. While the rows of hydrogen-bonded dimers that are common for carboxylic acid species are observed, the majority of adsorbed Fc(COOH)2 is instead found in six-molecule clusters with a well-defined and chiral geometry. The coverage and distribution of these clusters are consistent with a random sequential adsorption model, showing that solution-phase species are determinative of adsorbate distribution for this system under these reaction conditions.
低温扫描隧道显微镜用于观察二茂铁二甲酸（Fc(COOH)₂）在Au(111)表面的自组装结构。通过脉冲沉积溶解在甲醇中的Fc(COOH)₂来制备表面，在成像前将溶剂蒸发。虽然观察到了羧酸物种常见的氢键二聚体行，但大部分吸附的Fc(COOH)₂却以具有明确手性几何形状的六分子簇形式存在。这些簇的覆盖度和分布与随机顺序吸附模型一致，表明在这些反应条件下，该体系中溶液相物种决定了吸附质的分布。
