NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina

Vitally L. Budarin; James H. Clark; Sarah E. Hale; Stewart J. Tavener; Karl T. Mueller; Nancy M. Washton

doi:10.1021/la062900k

NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina

Vitally L. Budarin, James H. Clark, Sarah E. Hale, Stewart J. Tavener, Karl T. Mueller, Nancy M. Washton

Chemistry

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11 Scopus citations

Abstract

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 ¹⁹F 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 C ₆F₆ 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.

Original language	English (US)
Pages (from-to)	5412-5418
Number of pages	7
Journal	Langmuir
Volume	23
Issue number	10
DOIs	https://doi.org/10.1021/la062900k
State	Published - May 8 2007

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la062900k

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title = "NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina",

abstract = "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 19F 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 C 6F6 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.",

author = "Budarin, {Vitally L.} and Clark, {James H.} and Hale, {Sarah E.} and Tavener, {Stewart J.} and Mueller, {Karl T.} and Washton, {Nancy M.}",

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T1 - NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina

AU - Budarin, Vitally L.

AU - Clark, James H.

AU - Hale, Sarah E.

AU - Tavener, Stewart J.

AU - Mueller, Karl T.

AU - Washton, Nancy M.

PY - 2007/5/8

Y1 - 2007/5/8

N2 - 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 19F 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 C 6F6 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.

AB - 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 19F 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 C 6F6 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.

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JO - Langmuir

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NMR and IR study of fluorobenzene and hexafluorobenzene adsorbed on alumina

Abstract

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