β-联碳酰基类衍生物有序自组装膜的STM研究.pdfVIP

理化学学报(Wuli Huaxue Xuebao) June Acta Phys. Chim. Sin., 2006, 22(6) ：691 695 691 [Article] 联碳酰基类衍生物有序自组装膜的STM 研究 玉霞 Dirk Rohde 万立骏 (中国科学院化学研究所, 北京 100080) 摘要 在大气条件下, 利用扫描隧道显微镜研究了四个 鄄联碳酰基类衍生物在高定向裂解石墨(HOPG)表面的 自组装结构. 研究分子的结构中均包含仔 电子共轭体系和烷基链. 实验研究了分子结构对自组装结构的影响, 并利用分子结构的变化实现了自组装膜结构的调控. 结果表明, 在甲苯溶剂中制备的这些自组装结构均长程有 序, 分子间氢键和偶极相互作用是影响自组装膜结构变化的重要因素. 关键词： 扫描隧道显微镜, 鄄联碳酰基类衍生 , 自组装单层膜, 高定向裂解石墨 中图分类号： O641 Ordered Self assembled Monolayers of dicarbonyl Derivatives Studied by STM DIAO, Yu鄄Xia ROHDE, Dirk WAN, Li鄄Jun (Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China) Abstract The adsorption of four 鄄dicarbonyl derivatives on highly oriented pyrolytic graphite(HOPG) surface was studied by scanning tunneling microscopy (STM) in an ambient environment. All the molecules include 仔鄄conjugated part and alkyl chains in their chemical structures. The molecules were dissolved in toluene and a drop of the solution was deposited on HOPG to form self鄄assembled adlayer. The characteristic stripe鄄like structure in the self鄄assembled monolayer (SAM) on the high鄄resolution STM images of the compounds was observed . Different molecular structures led to different SAMs. It was found that noncovalent interactions such as hydrogen bonds and dipole鄄dipole interactions played an important role in the formation of different SAMs. Keywords ： Scanning tunneling microscopy, 鄄