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利用低温STM研究了非手性的棒状并五苯分子在Bi(111)表面形成的手性风车团簇.在团簇内部,并五苯分子分别沿Bi(111)的3个对称轴方向平行排列,形成6个不同的分子带.在每个分子带中,相邻分子之间有一个滑移错位.当平行排列的分子数多于4时,滑移错位发生反向,形成弯曲的风车扇叶.我们认为,分子的滑移错位来自于分子之间的π-π相互作用;而滑移错位的反向是团簇内部的吸引力导致的密堆积的结果.这两种作用的竞争是形成手性风车团簇的微观机制.
Chiral pinwheel clusters formed on the Bi (111) surface of achiral rods were studied by low-temperature STM. Within the cluster, the pentacene molecules are parallel to the three symmetry axes of Bi (111) Arranged to form six different molecular bands in each molecular band, there is a slip between adjacent molecules. When the number of molecules arranged in parallel is more than 4, the slip dislocation reverses to form a curved windmill In our opinion, the slip dislocation of a molecule results from the π-π interaction between molecules, whereas the opposite of slipping dislocation is the result of close packing due to the attraction inside the cluster. Is the formation of chiral windmill clusters micro-mechanism.