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Dynamic host–guest behavior in halogen-bonded two-dimensional molecular networks investigated by scanning tunneling microscopy at the solid/liquid interface
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-08-21 , DOI: 10.1039/d0na00616e Yoshihiro Kikkawa 1 , Mayumi Nagasaki 1 , Emiko Koyama 1 , Seiji Tsuzuki 1 , Thierry Fouquet 1 , Kazuhisa Hiratani 1
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-08-21 , DOI: 10.1039/d0na00616e Yoshihiro Kikkawa 1 , Mayumi Nagasaki 1 , Emiko Koyama 1 , Seiji Tsuzuki 1 , Thierry Fouquet 1 , Kazuhisa Hiratani 1
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The fabrication of supramolecularly engineered two-dimensional (2D) networks using simple molecular building blocks is an effective means for studying host–guest chemistry at surfaces toward the potential application of such systems in nanoelectronics and molecular devices. In this study, halogen-bonded molecular networks were constructed by the combination of linear halogen-bond donor and acceptor ligands, and their 2D structures at the highly oriented pyrolytic graphite/1-phenyloctane interface were studied by scanning tunneling microscopy. The bi-component blend of the molecular building blocks possessing tetradecyloxy chains formed a lozenge structure via halogen bonding. Upon the introduction of an appropriate guest molecule (e.g., coronene) into the system, the 2D structure transformed into a hexagonal array, and the central pore of this array was occupied by the guest molecules. Remarkably, the halogen bonding of the original structure was maintained after the introduction of the guest molecule. Thus, the halogen-bonded molecular networks are applicable for assembling guest species on the substrate without the requirement of the conventional rigid molecular building blocks with C3 symmetry.
中文翻译：
通过扫描隧道显微镜在固/液界面研究卤素键合二维分子网络中的动态主客体行为
使用简单的分子构件构建超分子工程二维（2D）网络是研究表面主客体化学的有效手段，以实现此类系统在纳米电子学和分子器件中的潜在应用。本研究通过线性卤键供体和受体配体的组合构建了卤键分子网络，并通过扫描隧道显微镜研究了它们在高度取向热解石墨/1-苯基辛烷界面处的二维结构。具有十四烷氧基链的分子构件的双组分混合物通过卤素键合形成菱形结构。在将适当的客体分子(例如晕苯)引入系统后，二维结构转变为六边形阵列，并且该阵列的中心孔被客体分子占据。值得注意的是，引入客体分子后，原始结构的卤素键得以保持。因此，卤素键合分子网络适用于在基底上组装客体物质，而不需要具有C 3对称性的常规刚性分子构建块。
更新日期：2020-10-13
中文翻译：
通过扫描隧道显微镜在固/液界面研究卤素键合二维分子网络中的动态主客体行为
使用简单的分子构件构建超分子工程二维（2D）网络是研究表面主客体化学的有效手段，以实现此类系统在纳米电子学和分子器件中的潜在应用。本研究通过线性卤键供体和受体配体的组合构建了卤键分子网络，并通过扫描隧道显微镜研究了它们在高度取向热解石墨/1-苯基辛烷界面处的二维结构。具有十四烷氧基链的分子构件的双组分混合物通过卤素键合形成菱形结构。在将适当的客体分子(例如晕苯)引入系统后，二维结构转变为六边形阵列，并且该阵列的中心孔被客体分子占据。值得注意的是，引入客体分子后，原始结构的卤素键得以保持。因此，卤素键合分子网络适用于在基底上组装客体物质，而不需要具有C 3对称性的常规刚性分子构建块。
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