Wu Dongxia, Deng Ke, He Meng, Zeng Qingdao, Wang Chen
Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
Chemphyschem. 2007 Jul 16;8(10):1519-23. doi: 10.1002/cphc.200700096.
A host supramolecular structure consisting of bis-(2,2':6',2"-terpyridine)-4'-oxyhexadecane (BT-O-C16) is shown to respond to coadsorbed molecules in dramatic ways, as observed by scanning tunneling microscopy (STM) on a highly oriented pyrolytic graphite (HOPG) surface under ambient conditions. Interestingly, the lattice parameter of the triphenylene-filled complex differs significantly from that of the coronene-filled one, although the triphenylene and coronene molecules are nearly the same size. The STM study and density functional theory calculations reveal that intermolecular hydrogen-bond interactions play an essential role in forming the assembly structures. The different electronic properties of coronene and triphenylene molecules are responsible for the difference in lattice parameters and consequently for the difference in filling behaviors in the coronene/BT-O-C16 and triphenylene/BT-O-C16 binary systems.
由双（2,2':6',2''-三联吡啶）-4'-氧代十六烷（BT-O-C16）组成的主体超分子结构，在环境条件下于高度取向的热解石墨（HOPG）表面通过扫描隧道显微镜（STM）观察发现，其对共吸附分子会产生显著响应。有趣的是，尽管三亚苯和蒄分子大小几乎相同，但三亚苯填充的配合物的晶格参数与蒄填充的配合物的晶格参数有显著差异。STM研究和密度泛函理论计算表明，分子间氢键相互作用在形成组装结构中起重要作用。蒄和三亚苯分子不同的电子性质导致了晶格参数的差异，进而导致了蒄/BT-O-C16和三亚苯/BT-O-C16二元体系中填充行为的差异。
