Chiral Transition of the Supramolecular Assembly by Concentration Modulation at the Liquid/Solid Interface

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• 作者：Li Xu ; Xinrui Miao ; Lihua Cui ; Pei Liu ; Kai Miao ; XiaoFeng Chen ; Wenli Deng
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 6, 2015
• 年：2015
• 卷：119
• 期：31
• 页码：17920-17929
• 全文大小：635K
• ISSN：1932-7455

文摘

Global hetero- and homochiral polymorphous assemblies from an achiral fluorenone derivative were successfully constructed with multiple intermolecular hydrogen bonds by concentration modulation. Scanning tunneling microscopy investigations reveal that a heterochiral supramolecular double rosette-like structure was fabricated for the first time via hydrogen bond interactions with achiral 1-octanoic acid under low concentrations. When the solution concentration was increased, the structural transition from a heterochiral double rosette-like structure to a homochiral windmill-like pattern was observed. Interestingly, these two metastable structures ultimately could transform into a stable zigzag pattern at a bias voltage prompted by the STM tip. At high concentrations, only an achiral octamer arrangement could be obtained, owing to the changes of intermolecular hydrogen bonding, van der Waals force, and dipole鈥揹ipole interactions. The present results provided an important impetus for the induction and control of polymorphous chiral structural transformation through modulated solution concentration of achiral 1-octanoic acid.