CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST) , Beijing 100190, P. R. China.
CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P. R. China.
ACS Nano. 2016 Jan 26;10(1):342-8. doi: 10.1021/acsnano.5b06666. Epub 2015 Dec 14.
In the present work, we report the fabrication of regular coronene (COR) clusters on surfaces in ambient conditions in the two-dimensional network formed by hexaphenylbenzene derivatives (HPB) via structural transformation. HPB could form a stable snowflake network structure on the highly oriented pyrolytic graphite surface at the air-solid interface. When COR molecules were introduced into the system, the HPB snowflake network could transform to honeycomb structures, and the COR heptamers were subsequently aggregated and entrapped into the cavity. Scanning tunneling microscopic was employed to monitor the assembly behavior of both HPB and HPB/COR at a submolecule scale level, and density functional theory calculations were utilized to reveal that the structural transformation and the entrapment are the energetically favorable. The pores formed from HPB might also give a clue to immobilizing some functional molecule clusters, like COR, to fabricate their ordered monolayer in ambient conditions, so as to obtain complex supramolecular surface structures.
在本工作中，我们报告了在环境条件下，通过结构转变，在由六苯苯衍生物（HPB）形成的二维网络上，在表面上制备规则的并五苯（COR）团簇。在空气-固体界面处，HPB 可以在高取向热解石墨表面上形成稳定的雪花网络结构。当 COR 分子被引入到体系中时，HPB 的雪花网络可以转变为蜂窝状结构，随后 COR 七聚体被聚集并包埋到空腔中。扫描隧道显微镜被用来在亚分子尺度上监测 HPB 和 HPB/COR 的组装行为，并且密度泛函理论计算被用来揭示结构转变和包埋是能量有利的。HPB 形成的孔也可能为固定一些功能分子团簇（如 COR）提供线索，以在环境条件下制备它们的有序单层，从而获得复杂的超分子表面结构。
