Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Proc Natl Acad Sci U S A. 2010 Feb 16;107(7):2769-74. doi: 10.1073/pnas.1000120107. Epub 2010 Feb 1.
OPV3-CHO molecules are employed to prepare assembly on highly oriented pyrolytic graphite, and the so-prepared assembly is investigated by scanning tunneling microscopy. In the assembly chiral domains are observed with various structures such as linear and windmill. The chiral structural formation, stability, transition, and possible unification are intensively studied. After thermal annealing, linear structure was the only structure. To achieve a unified assembly with a single structure, an efficient method is proposed by coadsorption of OPV3-CHO with selected molecules. For example, an assembly with side-by-side helix structure is formed by a simple coadsorption of OPV3-CHO with alkyl bromide (C(n)H(2n+1)Br, n = 15-18). The experiments by cocrystallization of OPV3-CHO/C(n)H(2n+1)X (X = Cl, Br, and I) show the important role of halogen bonding in formation of the uniform structure. The results are significant in understanding the intermolecular noncovalent interactions that dominate the surface structure and chirality.
OPV3-CHO 分子被用于在高度取向的热解石墨上进行组装，所制备的组装体通过扫描隧道显微镜进行研究。在组装体中观察到了各种结构的手性畴，如线性和风车状。对手性结构的形成、稳定性、转变和可能的统一进行了深入研究。热退火后，仅观察到线性结构。为了实现具有单一结构的统一组装，提出了一种通过与选定分子共吸附 OPV3-CHO 的有效方法。例如，通过 OPV3-CHO 与烷基溴化物（C(n)H(2n+1)Br，n = 15-18）的简单共吸附，形成了侧链螺旋结构的组装体。通过 OPV3-CHO/C(n)H(2n+1)X（X = Cl、Br 和 I）的共结晶实验表明，卤键在形成均匀结构中起着重要作用。这些结果对于理解控制表面结构和手性的分子间非共价相互作用具有重要意义。
