• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Chemical Physics >Experimental and theoretical study of the adsorption of fumaramide [2]rotaxane on Au(111) and Ag(111) surfaces
【24h】

Experimental and theoretical study of the adsorption of fumaramide [2]rotaxane on Au(111) and Ag(111) surfaces

机译：富马酰胺[2]轮烷在Au（111）和Ag（111）表面上吸附的实验和理论研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thin films of fumaramide [2] rotaxane, a mechanically interlocked molecule composed of a macrocycle and a thread in a "bead and thread" configuration, were prepared by vapor deposition on both Ag(111) and Au(111) substrates. X-ray photoelectron spectroscopy (XPS) and high-resolution electron-energy-loss spectroscopy were used to characterize monolayer and bulklike multilayer films. XPS determination of the relative amounts of carbon, nitrogen, and oxygen indicates that the molecule adsorbs intact. On both metal surfaces, molecules in the first adsorbed layer show an additional component in the C 1s XPS line attributed to chemisorption via amide groups. Molecular-dynamics simulation indicates that the molecule orients two of its eight phenyl rings, one from the macrocycle and one from the thread, in a parallel bonding geometry with respect to the metal surfaces, leaving three amide groups very close to the substrate. In the case of fumaramide [2]rotaxane adsorption on Au(111), the presence of certain out-of-plane phenyl ring and Au-O vibrational modes points to such bonding and a preferential molecular orientation. The theoretical and experimental results imply that the three-dimensional intermolecular configuration permits chemisorption at low coverage to be driven by interactions between the three amide functions of fumaramide [2]rotaxane and the Ag(111) or Au(111) surface. (c) 2005 American Institute of Physics.
机译：富马酰胺[2]轮烷的薄膜是通过在Ag（111）和Au（111）基板上气相沉积而制备的，该机械互锁的分子由大环和“珠和线”构型的线组成。 X射线光电子能谱（XPS）和高分辨率电子能量损失能谱用于表征单层和块状多层膜。 XPS测定碳，氮和氧的相对量表示该分子完整吸附。在两个金属表面上，第一吸附层中的分子在C 1s XPS线中显示出一个附加成分，这归因于通过酰胺基团的化学吸附。分子动力学模拟表明，该分子以相对于金属表面的平行键几何结构定向其八个苯环中的两个，一个来自大环，一个来自于线，使三个酰胺基非常靠近底物。在富马酰胺[2]轮烷在Au（111）上吸附的情况下，某些平面外苯环和Au-O振动模式的存在表明这种键合和优先的分子取向。理论和实验结果表明，三维分子间构型允许富马酰胺[2]轮烷的三个酰胺官能团与Ag（111）或Au（111）表面之间的相互作用驱动低覆盖率的化学吸附。 （c）2005年美国物理研究所。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号