NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina

被引：9

作者：

Budarin, Vitaliy L.

Clark, James H.

Hale, Sarah E.

Tavener, Stewart J. ^{[1
]}

Mueller, Karl T.

Washton, Nancy M.

机构：

[1] Univ York, Green Chem Ctr, Dept Chem, York YO10 5DD, N Yorkshire, England

[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

LANGMUIR | 2007年 / 23卷 / 10期

关键词：

D O I：

10.1021/la062900k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The adsorption of fluorobenzene (C6H5F) and hexafluorobenzene (C6F6) onto the surface of neutral alumina is investigated by reflectance IR spectroscopy, near-IR spectroscopy, and measurement of F-19 NMR chemical shift values. Chemical shifts are dependent on surface coverage and reveal multiple peaks where different adsorption environments occur. C6H5F appears to be adsorbed through polar interactions with surface hydroxyls, whereas C6F6 shows separate resonances for the first layer of coverage and outer layers. Available surface areas are estimated, and reorientation of adsorbed hexafluorobenzene is proposed to account for chemical shift behavior and differences between calculated and measured monolayer coverage.

引用

页码：5412 / 5418

页数：7

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