CH vibrational mode-softening in alkyl groups bound to Cu(111)

Jong Liang Lin; Brian E. Bent

doi:10.1016/0009-2614(92)85536-J

CH vibrational mode-softening in alkyl groups bound to Cu(111)

Jong Liang Lin, Brian E. Bent

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

The surface vibrations of C₁C₃ alkyl groups bound to a Cu(111) surface have been studied by high resolution electron energy loss spectroscopy. The alkyl groups were generated by the dissociative adsorption of alkyl iodides and bromides. All of the adsorbed alkyls show CH stretching mode-softening, and isotope labelling studies indicate that the softened CH bonds are those at the α-carbon (the one bonded to the surface). Our results suggest that charge donation from the metal to the antibonding orbital of the alkyl groups is the cause of the CH stretching mode-softening.

Original language	English
Pages (from-to)	208-212
Number of pages	5
Journal	Chemical Physics Letters
Volume	194
Issue number	3
DOIs	https://doi.org/10.1016/0009-2614(92)85536-J
Publication status	Published - 1992 Jun 26

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/0009-2614(92)85536-J

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title = "CH vibrational mode-softening in alkyl groups bound to Cu(111)",

abstract = "The surface vibrations of C1C3 alkyl groups bound to a Cu(111) surface have been studied by high resolution electron energy loss spectroscopy. The alkyl groups were generated by the dissociative adsorption of alkyl iodides and bromides. All of the adsorbed alkyls show CH stretching mode-softening, and isotope labelling studies indicate that the softened CH bonds are those at the α-carbon (the one bonded to the surface). Our results suggest that charge donation from the metal to the antibonding orbital of the alkyl groups is the cause of the CH stretching mode-softening.",

author = "Lin, {Jong Liang} and Bent, {Brian E.}",

note = "Funding Information: We thank L.H. Dubois and F. Zaera for preprints of manuscripts prior to publication. Financial support from the National Science Foundation (Grant No. CHE-90-22077) and from the Joint Services Electronics Program through the Columbia Radiation Laboratory (Contract No. DAAL03-9 l-C-0016 ) is gratefully acknowledged. BEB is a Presidential Young Investigator.",

year = "1992",

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doi = "10.1016/0009-2614(92)85536-J",

language = "English",

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T1 - CH vibrational mode-softening in alkyl groups bound to Cu(111)

AU - Lin, Jong Liang

AU - Bent, Brian E.

N1 - Funding Information: We thank L.H. Dubois and F. Zaera for preprints of manuscripts prior to publication. Financial support from the National Science Foundation (Grant No. CHE-90-22077) and from the Joint Services Electronics Program through the Columbia Radiation Laboratory (Contract No. DAAL03-9 l-C-0016 ) is gratefully acknowledged. BEB is a Presidential Young Investigator.

PY - 1992/6/26

Y1 - 1992/6/26

N2 - The surface vibrations of C1C3 alkyl groups bound to a Cu(111) surface have been studied by high resolution electron energy loss spectroscopy. The alkyl groups were generated by the dissociative adsorption of alkyl iodides and bromides. All of the adsorbed alkyls show CH stretching mode-softening, and isotope labelling studies indicate that the softened CH bonds are those at the α-carbon (the one bonded to the surface). Our results suggest that charge donation from the metal to the antibonding orbital of the alkyl groups is the cause of the CH stretching mode-softening.

AB - The surface vibrations of C1C3 alkyl groups bound to a Cu(111) surface have been studied by high resolution electron energy loss spectroscopy. The alkyl groups were generated by the dissociative adsorption of alkyl iodides and bromides. All of the adsorbed alkyls show CH stretching mode-softening, and isotope labelling studies indicate that the softened CH bonds are those at the α-carbon (the one bonded to the surface). Our results suggest that charge donation from the metal to the antibonding orbital of the alkyl groups is the cause of the CH stretching mode-softening.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

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ER -

CH vibrational mode-softening in alkyl groups bound to Cu(111)

Abstract

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