Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore.
Langmuir. 2010 Mar 2;26(5):3329-34. doi: 10.1021/la9030798.
The self-assembly of the binary molecular system comprising copper(II) phthalocyanine (CuPc) and copper-hexadecafluoro-phthalocyanine (F(16)CuPc) on graphite has been investigated by in situ low-temperature scanning tunneling microscopy (LT-STM). The adsorption of this binary molecular system on graphite results in the formation of a well-ordered chessboardlike nanopattern. The in-plane molecular orientation of the guest CuPc molecules can be tuned by varying the coverage. At low coverage, the sparse CuPc molecules are randomly embedded in the host F(16)CuPc monolayer, possessing two different in-plane orientations; as the CuPc coverage increases, the in-plane molecular orientations of CuPc and F(16)CuPc become unidirectional and a highly ordered chessboardlike pattern forms. Molecular dynamic (MD) simulation results suggest that the selective and directional intermolecular hydrogen bonding determines the in-plane molecular orientation as well as the supramolecular packing arrangement.
通过原位低温扫描隧道显微镜（LT-STM）研究了由铜酞菁（CuPc）和全氟十六烷铜酞菁（F(16)CuPc）组成的二元分子体系在石墨上的自组装。该二元分子体系在石墨上的吸附导致形成了一种有序的棋盘状纳米图案。通过改变覆盖率，可以调整客体 CuPc 分子的面内分子取向。在低覆盖率下，稀疏的 CuPc 分子随机嵌入在主体 F(16)CuPc 单层中，具有两种不同的面内取向；随着 CuPc 覆盖率的增加，CuPc 和 F(16)CuPc 的面内分子取向变得单向，形成高度有序的棋盘状图案。分子动力学（MD）模拟结果表明，选择性和方向性的分子间氢键决定了面内分子取向以及超分子堆积排列。
