STRUCTURAL STUDY OF 1,2-DICHLOROETHANE ON CU(111) USING X-RAY ABSORPTION AND STANDING WAVES

被引：21

作者：

KERKAR, M ^{[1
]}

WALTER, WK ^{[1
]}

WOODRUFF, DP ^{[1
]}

JONES, RG ^{[1
]}

ASHWIN, MJ ^{[1
]}

MORGON, C ^{[1
]}

机构：

[1] UNIV NOTTINGHAM,DEPT CHEM,NOTTINGHAM NG7 5RD,ENGLAND

来源：

SURFACE SCIENCE | 1992年 / 268卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(92)90948-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of 1,2-dichloroethane (DCE) adsorbed on Cu(111) in a single monolayer form has been investigated using Cl K-edge near-edge X-ray absorption and normal-incidence standing X-ray wavefield absorption at the (111) reflection. These measurements indicate a small tilt (25-degrees) of the Cl-C axis from parallel to the surface, and two different equally occupied Cl-Cu layer spacings relative to the extended lattice planes of 1.0 and 1.6 angstrom. These results are found to be best reconciled with a structural model in which the DCE bonds with the Cl-C-C-Cl plane of the trans conformer perpendicular to the surface and the Cl atoms over atop adsorption sites, the Cu-Cl bondlength being compatible with the van der Waals radius for Cl. The possible role of a frustrated rotational mode of the adsorbed molecule leading to a "flipping" between two equivalent states is considered.

引用

页码：36 / 44

页数：9

共 16 条

[1] THE CORRELATION BETWEEN ELECTRON TRANSMISSION AND INNER SHELL ELECTRON-EXCITATION SPECTRA [J].