Coexistence and interconversion of Di-σ and π-bonded ethylene on the Pt(111) and Pd(110) surfaces

Tomonari Okada; Yousoo Kim; Yasuyuki Sainoo; Tadahiro Komeda; Michael Trenary; Maki Kawai

doi:10.1021/jz200912a

Coexistence and interconversion of Di-σ and π-bonded ethylene on the Pt(111) and Pd(110) surfaces

Tomonari Okada, Yousoo Kim, Yasuyuki Sainoo, Tadahiro Komeda, Michael Trenary, Maki Kawai

IMRAM - Division of Measurements

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21 Citations (Scopus)

Abstract

A low-temperature scanning tunneling microscope operated at 4.7 K was used to observe individual molecules of ethylene on the Pt(111) and Pd(110) surfaces following adsorption at 50 K. In both cases, two forms of the molecules were observed and were found to switch from one to the other under the influence of the tip. The form with the greater apparent height is attributed to π-bonded ethylene, and the other form is attributed to di-σ bonded ethylene. The images provide direct evidence that on both surfaces π-bonded ethylene occupies an on-top site and di-σ bonded ethylene occupies a symmetric bridging site. The results are compared with predictions based on DFT calculations that di-σ bonded ethylene should be the most stable form on both surfaces.

Original language	English
Pages (from-to)	2263-2266
Number of pages	4
Journal	Journal of Physical Chemistry Letters
Volume	2
Issue number	17
DOIs	https://doi.org/10.1021/jz200912a
Publication status	Published - 2011 Sept 1

Keywords

Catalysis
Interfaces
Surfaces

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10.1021/jz200912a

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abstract = "A low-temperature scanning tunneling microscope operated at 4.7 K was used to observe individual molecules of ethylene on the Pt(111) and Pd(110) surfaces following adsorption at 50 K. In both cases, two forms of the molecules were observed and were found to switch from one to the other under the influence of the tip. The form with the greater apparent height is attributed to π-bonded ethylene, and the other form is attributed to di-σ bonded ethylene. The images provide direct evidence that on both surfaces π-bonded ethylene occupies an on-top site and di-σ bonded ethylene occupies a symmetric bridging site. The results are compared with predictions based on DFT calculations that di-σ bonded ethylene should be the most stable form on both surfaces.",

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T1 - Coexistence and interconversion of Di-σ and π-bonded ethylene on the Pt(111) and Pd(110) surfaces

AU - Okada, Tomonari

AU - Kim, Yousoo

AU - Sainoo, Yasuyuki

AU - Komeda, Tadahiro

AU - Trenary, Michael

AU - Kawai, Maki

PY - 2011/9/1

Y1 - 2011/9/1

N2 - A low-temperature scanning tunneling microscope operated at 4.7 K was used to observe individual molecules of ethylene on the Pt(111) and Pd(110) surfaces following adsorption at 50 K. In both cases, two forms of the molecules were observed and were found to switch from one to the other under the influence of the tip. The form with the greater apparent height is attributed to π-bonded ethylene, and the other form is attributed to di-σ bonded ethylene. The images provide direct evidence that on both surfaces π-bonded ethylene occupies an on-top site and di-σ bonded ethylene occupies a symmetric bridging site. The results are compared with predictions based on DFT calculations that di-σ bonded ethylene should be the most stable form on both surfaces.

AB - A low-temperature scanning tunneling microscope operated at 4.7 K was used to observe individual molecules of ethylene on the Pt(111) and Pd(110) surfaces following adsorption at 50 K. In both cases, two forms of the molecules were observed and were found to switch from one to the other under the influence of the tip. The form with the greater apparent height is attributed to π-bonded ethylene, and the other form is attributed to di-σ bonded ethylene. The images provide direct evidence that on both surfaces π-bonded ethylene occupies an on-top site and di-σ bonded ethylene occupies a symmetric bridging site. The results are compared with predictions based on DFT calculations that di-σ bonded ethylene should be the most stable form on both surfaces.

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KW - Interfaces

KW - Surfaces

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Coexistence and interconversion of Di-σ and π-bonded ethylene on the Pt(111) and Pd(110) surfaces

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Keywords

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