Solvent-Controlled 2D Host-Guest (2,7,12-Trihexyloxytruxene/Coronene) Molecular Nanostructures at Organic Liquid/Solid Interface Investigated by Scanning Tunneling Microscopy
Solvent-Controlled 2D Host-Guest (2,7,12-Trihexyloxytruxene/Coronene) Molecular Nanostructures at Organic Liquid/Solid Interface Investigated by Scanning Tunneling Microscopy
复制标题
通过扫描隧道显微镜研究有机液/固界面处溶剂控制的二维主客体（2,7,12-三己氧基芴/晕苯）分子纳米结构
DOI：
10.1021/la904568q
复制
发表时间：
2010-06-01
期刊：
影响因子：
3.9
通讯作者：
Wan, Li-Jun
中科院分区：
文献类型：
--
作者：
Liu, Jia;Zhang, Xu;Wan, Li-Jun
2，7，12-三己氧基三苯（Tr）在高取向热解石墨（HOPG）表面的二维自组装网络可容纳晕苯客体分子。通过扫描隧道显微镜（STM）在液/固界面处揭示了主体-客体结构。在不同的溶剂中，如1，2，4-三氯苯（TCB），1-苯基辛烷，1-辛醇，和十四烷的主-客体结构的溶剂的影响进行了深入的研究。与不同溶剂中Tr主体模板在HOPG上的类似二维六方自组装相反，Tr 2D网络中晕苯主客体纳米结构的形成强烈依赖于溶剂的极性。在主-客体组装过程中的热力学平衡进行了讨论，并提出溶剂客体相互作用的主要贡献者所观察到的溶剂效应在2D主-客体自组装过程中。研究结果对表面主客体化学和纳米图案化具有重要意义。
The two-dimensional (2D) self-assembled networks of 2,7,12-trihexyloxytruxene (Tr) are shown to accommodate coronene guest molecules on highly oriented pyrolytic graphite (HOPG) surfaces. The host-guest structures are revealed by scanning tunneling microscopy (STM) at liquid/solid interfaces. The effect of solvents on the host-guest structures is intensively investigated in different solvents such as 1,2,4-trichlorobenzene (TCB), 1-phenyloctane, 1-octanol, and tetradecane. In contrast to the similar 2D hexagonal self-assembly of Tr host template on HOPG in different solvents, the formation of host-guest nanostructures of coronene in Tr 2D network strongly depend on the polarity of the solvents. The thermodynamic equilibrium during the host-guest assembly process is discussed, and the solvent guest interaction is proposed as a main contributor for the observed solvent effect in the 2D host-guest self-assembly process. The results are significant to surface host-guest chemistry and nanopatterning.