Xiao Wende, Feng Xinliang, Ruffieux Pascal, Gröning Oliver, Müllen Klaus, Fasel Roman
Empa, Swiss Federal Laboratories for Materials Testing and Research, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland.
J Am Chem Soc. 2008 Jul 16;130(28):8910-2. doi: 10.1021/ja7106542. Epub 2008 Jun 18.
Self-assembly of the specifically designed 3-fold symmetric 1,3,5-trikis(4'-carboxylphenyl)-2,4,6-trikis(4'-tert-butylphenyl)-benzene molecule on a Au(111) surface is investigated by means of in situ ultrahigh vacuum scanning tunneling microscopy. A variety of chiral honeycomb networks with increasing interpore distance is observed. Experiments and force field calculations reveal that the formation of the two-dimensional hexagonal porous networks is driven by a balance of molecular close-packing within half-unit cells and cyclic hydrogen bonding dimerization between half-unit cells. The honeycomb networks are shown to be chiral owing to asymmetric molecular close-packing within the half-unit cells.
通过原位超高真空扫描隧道显微镜研究了特别设计的具有三重对称性的1,3,5-三（4'-羧基苯基）-2,4,6-三（4'-叔丁基苯基）-苯分子在Au(111)表面的自组装。观察到了多种孔间距不断增加的手性蜂窝状网络。实验和力场计算表明，二维六边形多孔网络的形成是由半晶胞内分子紧密堆积与半晶胞间环状氢键二聚作用之间的平衡驱动的。由于半晶胞内分子的不对称紧密堆积，蜂窝状网络显示出具有手性。
