Separation of halogenated benzenes enabled by investigation of halogen-π interactions with carbon materials.

ABSTRACT: The halogen-π (X-π) interaction is an intermolecular interaction between the electron-poor region of bonded halogen atoms and aromatic rings. We report an experimental evaluation of the halogen-π (X-π) interaction using liquid chromatography with carbon-material coated columns providing strong π interactions in the normal phase mode. A C70-fullerene (C70)-coated column showed higher retentions for halogenated benzenes as the number of halogen substitutions increased as a result of X-π interactions. In addition, the strength of the X-π interaction increased in the order of F < Cl < Br < I. Changes to the UV absorption of C70 and the brominated benzenes suggested that the intermolecular interaction changed from the π-π interaction to X-π interaction as the number of bromo substitutions incre

SUBMITTER: Kanao E 

PROVIDER: S-EPMC7067276 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature