Dynamic control over supramolecular handedness by selecting chiral induction pathways at the solution-solid interface

Yuan Fang, Elke Ghijsens, Oleksandr Ivasenko*, Hai Cao, Aya Noguchi, Kunal S. Mali, Kazukuni Tahara, Tobe Yoshito, Steven De Feyter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

A dominant theme within the research on two-dimensional chirality is the sergeant-soldiers principle, wherein a small fraction of chiral molecules (sergeants) is used to skew the handedness of achiral molecules (soldiers) to generate a homochiral surface. Here, we have combined the sergeant-soldiers principle with temperature-dependent molecular self-assembly to unravel a peculiar chiral amplification mechanism at the solution-solid interface in which, depending on the concentration of a sergeant-soldiers solution, the majority handedness of the system can either be amplified or entirely reversed after an annealing step, furnishing a homochiral surface. Two discrete pathways that affect different stages of two-dimensional crystal growth are invoked for rationalizing this phenomenon and we present a set of experiments where the access to each pathway can be precisely controlled. These results demonstrate that a detailed understanding of subtle intermolecular and interfacial interactions can be used to induce drastic changes in the handedness of a supramolecular network.

Original languageEnglish
Pages (from-to)711-717
Number of pages7
JournalNature Chemistry
Volume8
Issue number7
DOIs
StatePublished - 1 Jul 2016

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