The adsorption and reaction of cyclohexane on Pd(110); Evidence for CH...M interactions and mode-softening

R. Raval; M. E. Pemble; M. A. Chesters

doi:10.1016/0039-6028(89)90111-8

The adsorption and reaction of cyclohexane on Pd(110); Evidence for CH...M interactions and mode-softening

R. Raval
, M. E. Pemble
, M. A. Chesters

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

Abstract

The adsorption of cyclohexane on Pd(110) has been studied by electron energy loss spectroscopy (EELS). At 115 K, cyclohexane is molecularly adsorbed and interacts with the surface via a CH...M interaction which is analogous to hydrogen-bonding. This results in the "softening" of some CH stretching modes which broaden and shift down in frequency. On- and off-specular EELS data, obtained after adsorption at 115 K, suggest that cyclohexane is adsorbed in its chair conformation and not in its boat or twist-boat conformations. Significantly, this suggests that a good geometric fit between the cyclohexane molecule and the surface is not essential for CH mode softening to occur. Upon heating the cyclohexane molecule dehydrogenates. It is thought this reaction is facilitated by the CH...M interaction which weakens the CH bond.

Original language	English
Pages (from-to)	187-200
Number of pages	14
Journal	Surface Science
Volume	210
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(89)90111-8
Publication status	Published - 2 Mar 1989
Externally published	Yes

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title = "The adsorption and reaction of cyclohexane on Pd(110); Evidence for CH...M interactions and mode-softening",

abstract = "The adsorption of cyclohexane on Pd(110) has been studied by electron energy loss spectroscopy (EELS). At 115 K, cyclohexane is molecularly adsorbed and interacts with the surface via a CH...M interaction which is analogous to hydrogen-bonding. This results in the {"}softening{"} of some CH stretching modes which broaden and shift down in frequency. On- and off-specular EELS data, obtained after adsorption at 115 K, suggest that cyclohexane is adsorbed in its chair conformation and not in its boat or twist-boat conformations. Significantly, this suggests that a good geometric fit between the cyclohexane molecule and the surface is not essential for CH mode softening to occur. Upon heating the cyclohexane molecule dehydrogenates. It is thought this reaction is facilitated by the CH...M interaction which weakens the CH bond.",

author = "R. Raval and Pemble, \{M. E.\} and Chesters, \{M. A.\}",

year = "1989",

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T1 - The adsorption and reaction of cyclohexane on Pd(110); Evidence for CH...M interactions and mode-softening

AU - Raval, R.

AU - Pemble, M. E.

AU - Chesters, M. A.

PY - 1989/3/2

Y1 - 1989/3/2

N2 - The adsorption of cyclohexane on Pd(110) has been studied by electron energy loss spectroscopy (EELS). At 115 K, cyclohexane is molecularly adsorbed and interacts with the surface via a CH...M interaction which is analogous to hydrogen-bonding. This results in the "softening" of some CH stretching modes which broaden and shift down in frequency. On- and off-specular EELS data, obtained after adsorption at 115 K, suggest that cyclohexane is adsorbed in its chair conformation and not in its boat or twist-boat conformations. Significantly, this suggests that a good geometric fit between the cyclohexane molecule and the surface is not essential for CH mode softening to occur. Upon heating the cyclohexane molecule dehydrogenates. It is thought this reaction is facilitated by the CH...M interaction which weakens the CH bond.

AB - The adsorption of cyclohexane on Pd(110) has been studied by electron energy loss spectroscopy (EELS). At 115 K, cyclohexane is molecularly adsorbed and interacts with the surface via a CH...M interaction which is analogous to hydrogen-bonding. This results in the "softening" of some CH stretching modes which broaden and shift down in frequency. On- and off-specular EELS data, obtained after adsorption at 115 K, suggest that cyclohexane is adsorbed in its chair conformation and not in its boat or twist-boat conformations. Significantly, this suggests that a good geometric fit between the cyclohexane molecule and the surface is not essential for CH mode softening to occur. Upon heating the cyclohexane molecule dehydrogenates. It is thought this reaction is facilitated by the CH...M interaction which weakens the CH bond.

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U2 - 10.1016/0039-6028(89)90111-8

DO - 10.1016/0039-6028(89)90111-8

M3 - Article

AN - SCOPUS:0009949971

SN - 0039-6028

VL - 210

SP - 187

EP - 200

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

The adsorption and reaction of cyclohexane on Pd(110); Evidence for CH...M interactions and mode-softening

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