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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Structure and structural transition of chiral domains in oligo(p-phenylenevinylene) assembly investigated by scanning tunneling microscopy
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Structure and structural transition of chiral domains in oligo(p-phenylenevinylene) assembly investigated by scanning tunneling microscopy

机译：扫描隧道显微镜研究低聚（对亚苯基亚乙烯基）组装物中手性结构域的结构和结构转变

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摘要

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_nH_(2n+1)Br, n = 15-18). The experiments by cocrystallization of OPV3-CHO/ C_nH_(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.
机译：使用OPV3-CHO分子在高度取向的热解石墨上制备组装体，并通过扫描隧道显微镜对如此制备的组装体进行研究。在组装过程中，使用线性和风车等各种结构观察到手性域。大量研究了手性结构的形成，稳定性，过渡和可能的统一。热退火后，线性结构是唯一的结构。为了实现具有单一结构的统一组装，提出了一种通过将OPV3-CHO与所选分子共吸附的有效方法。例如，通过OPV3-CHO与烷基溴（C_nH_（2n + 1）Br，n = 15-18）的简单共吸附形成具有并排螺旋结构的组件。 OPV3-CHO / C_nH_（2n + 1）X（X = Cl，Br和I）的共结晶实验表明，卤素键在形成均匀结构中起着重要作用。结果对于理解支配表面结构和手性的分子间非共价相互作用具有重要意义。

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  • 作者

    Qing Chen; Ting Chen; Dong Wang; Hui-Biao Liu; Yu-Liang Li; Li-Jun Wan;

  • 作者单位

    Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China Graduate University of Chinese Academy of Sciences, Beijing 100064, China;

    rnBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    rnBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    rnBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    rnBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    rnBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coadsorption; halogen bonding; surface chirality;

    机译：共吸附卤素键表面手性;

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