Supramolecular Induction of Topological Chirality from Nanoscale Helical Silica Scaffolds to Achiral Molecular Chromophores,The Journal of Physical Chemistry C

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Supramolecular Induction of Topological Chirality from Nanoscale Helical Silica Scaffolds to Achiral Molecular Chromophores
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-09-28 , DOI: 10.1021/acs.jpcc.0c06847
Antoine Scalabre ₁ , Ana M. Gutiérrez-Vílchez ₂ , Ángela Sastre-Santos ₂ , Fernando Fernández-Lázaro ₂ , Dario M. Bassani ₃ , Reiko Oda ₁

Affiliation

Chiral induction from macroscopic objects possessing topological chirality to small molecules is demonstrated using nonchiral organic chromophores based on pyrene and perylene derivatives covalently grafted onto nanometric silica helices. The grafted chromophores are found to display induced chiroptical signals despite the absence of asymmetric atoms. The observed chiral induction is attributed to supramolecular chiral organization of the chromophores on the helical silica surface as evidenced by the variation of the induced circular dichroism signal with increasing surface density of the achiral chromophore. The magnitude of the induced chiroptical signals increases exponentially with the grafting density of the chromophores, suggesting that chiral induction occurs cooperatively.

中文翻译：

从纳米螺旋硅胶支架到手性分子发色团的拓扑手性的超分子诱导。

使用基于pyr和and衍生物的非手性有机生色团共价接枝到纳米二氧化硅螺旋上，证明了具有拓扑手性的宏观物体的手性诱导。尽管不存在不对称原子，但发现嫁接的生色团显示出感应的手性信号。所观察到的手性诱导归因于螺旋二氧化硅表面上发色团的超分子手性组织，这由所诱导的圆二色性信号随非手性发色团表面密度的增加而变化所证明。诱导的手性信号的强度随生色团的接枝密度呈指数增加，这表明手性诱导是协同发生的。

更新日期：2020-10-30

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