Surface-induced bond anharmonicity probed through a two-phonon bound state: Methoxide adsorbed on Mo(110)

被引：18

作者：

Uvdal, P ^{[1
]}

Weldon, MK ^{[1
]}

Friend, CM ^{[1
]}

机构：

[1] HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.53.5007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nu(0-->2) excitation of the C-O stretch in methoxide adsorbed on Mo(110)is analyzed by infrared absorption spectroscopy. Using isotopic dilutions we conclusively assign this vibrational band to a two-phonon bound state. The influence of the surface on the intramolecular potential can thereby be directly probed. A threefold increase of the anharmonicity is found for the adsorbed species, compared to gaseous methanol. The effect of both dipole-dipole coupling and adsorbate inhomogeneity on the two-phonon bound state is experimentally investigated.

引用

页码：5007 / 5010

页数：4