Effect of internal oxygen substituents on the properties of bowl-shaped aromatic hydrocarbons
Literature Information
Yoshihiro Takeo, Junichiro Hirano, Daiki Shimizu, Hiroshi Shinokubo
Internally substituted π-systems have remained somewhat underexplored in contrast to their peripherally functionalized counterparts. In this study, we compare a bowl-shaped aromatic hydrocarbon with internal methoxy groups to related derivatives with hydrogen, methyl, and anisyl groups, evaluating their electron-accepting properties, electronic absorption spectra, and fullerene-binding behavior. The methoxy-substituted derivative exhibits enhanced electron-accepting properties and positively shifted electrostatic potential mapping on its concave surface due to the inductive effect of the oxygen atoms. The σ* orbitals of the internal C–O bonds participate in π-conjugation to change the absorption properties of the bowl-shaped π-skeleton. As hydrocarbons internally substituted with oxygen are key fragments of graphene oxide, these results can be expected to aid the understanding of the structure–property relationships in graphene oxide. Furthermore, internal substitution with oxygen atoms decreases the efficiency of fullerene-binding, thus affording fundamental insights into the design of advanced fullerene-receptors.
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Organic Chemistry Frontiers

Organic Chemistry Frontiers publishes high-quality research from across organic chemistry. Emphases are placed on studies that make significant contributions to the field of organic chemistry by reporting either new or significantly improved protocols or methodologies. Topics include, but are not limited to the following: Organic synthesis Development of synthetic methodologies Catalysis Natural products Functional organic materials Supramolecular and macromolecular chemistry Physical and computational organic chemistry












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