TY - JOUR
T1 - Observation of cis-2-butene molecule on Pd(1 1 0) by cryogenic STM
T2 - Site determination using tunneling-current-induced rotation
AU - Sainoo, Y.
AU - Kim, Y.
AU - Komeda, T.
AU - Kawai, Maki
AU - Shigekawa, H.
PY - 2003/6/20
Y1 - 2003/6/20
N2 - We have investigated the bonding configuration of an isolated cis-2-butene molecule (CH3-CH=CH-CH3) on the Pd(110) surface using a cryogenic STM at the sample temperature of 4.7 K. For the precise determination of the bonding site of the molecule, we utilize a novel method of rotating the molecule by injecting tunneling electrons into the molecule. We have observed the rotation of the molecule around the terminal site of a single Pd atom with hopping between four equivalent bonding sites when tunneling electrons with the energy of 170 meV were dosed. The bonding between the cis-2-molecule and the Pd(110) surface is considerably through π-bonding at the carbon double-bond, which makes bonding on the terminal site favorable. However, the analysis of the images of rotating molecule reveals that the C=C is shifted from the terminal site and located at the off-symmetry position.
AB - We have investigated the bonding configuration of an isolated cis-2-butene molecule (CH3-CH=CH-CH3) on the Pd(110) surface using a cryogenic STM at the sample temperature of 4.7 K. For the precise determination of the bonding site of the molecule, we utilize a novel method of rotating the molecule by injecting tunneling electrons into the molecule. We have observed the rotation of the molecule around the terminal site of a single Pd atom with hopping between four equivalent bonding sites when tunneling electrons with the energy of 170 meV were dosed. The bonding between the cis-2-molecule and the Pd(110) surface is considerably through π-bonding at the carbon double-bond, which makes bonding on the terminal site favorable. However, the analysis of the images of rotating molecule reveals that the C=C is shifted from the terminal site and located at the off-symmetry position.
KW - Alkenes
KW - Palladium
KW - Scanning tunneling microscopy
KW - Surface electronic phenomena (work function, surface potential, surface states, etc.)
KW - Tunneling
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U2 - 10.1016/S0039-6028(03)00564-8
DO - 10.1016/S0039-6028(03)00564-8
M3 - Article
AN - SCOPUS:0038358128
SN - 0039-6028
VL - 536
SP - L403-L407
JO - Surface Science
JF - Surface Science
IS - 1-3
ER -