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

共 22 条

[1] INELASTIC ELECTRON-SCATTERING BY A COLLECTIVE VIBRATIONAL-MODE OF ADSORBED CO [J].

ANDERSSON, S ;

PERSSON, BNJ .

PHYSICAL REVIEW LETTERS, 1980, 45 (17) :1421-1424

[2] ENERGY-DEPENDENCE OF VIBRATIONAL-EXCITATION OF ADSORBED CO AND OH [J].

ANDERSSON, S ;

DAVENPORT, JW .

SOLID STATE COMMUNICATIONS, 1978, 28 (08) :677-681

[3] RESONANCE SCATTERING OF ELECTRONS FROM N-2, CO, O-2, AND H-2 ADSORBED ON A SILVER SURFACE [J].

DEMUTH, JE ;

SCHMEISSER, D ;

AVOURIS, P .

PHYSICAL REVIEW LETTERS, 1981, 47 (16) :1166-1169

[4] ELECTRON-ENERGY-LOSS-SPECTROSCOPY SCATTERING PROFILES OF VIBRATIONAL OVERTONES AND DOUBLE LOSSES [J].

DEPAOLA, RA ;

HOFFMANN, FM .

PHYSICAL REVIEW B, 1984, 30 (02) :1122-1124

[5] 2-PHONON BOUND-STATE FOR THE HYDROGEN VIBRATION ON THE H/SI(111) SURFACE [J].

GUYOTSIONNEST, P .

PHYSICAL REVIEW LETTERS, 1991, 67 (17) :2323-2326

[6]

HERZBERG G, 1950, MOL SPECTRA MOL STRU, V2

[7]

Herzberg G, 1945, MOL SPECTRA MOL STRU, V13

[8] ANOMALOUS C-O BOND WEAKENING OF SIDE-ON BONDED CARBON-MONOXIDE ON A POTASSIUM-PROMOTED RU(001) SURFACE [J].

HOFFMANN, FM ;

DEPAOLA, RA .

PHYSICAL REVIEW LETTERS, 1984, 52 (19) :1697-1700

[9] PHYSISORPTION OF CO AND N2 ON AL(111) - OBSERVATION OF SURFACE-MOLECULE VIBRATIONS IN ELECTRON RESONANCE SCATTERING [J].

JACOBI, K ;

BERTOLO, M .

PHYSICAL REVIEW B, 1990, 42 (06) :3733-3736

[10] ANHARMONICITY, PHONON LOCALIZATION, 2-PHONON BOUND-STATES, AND VIBRATIONAL-SPECTRA [J].

KIMBALL, JC ;

FONG, CY ;

SHEN, YR .

PHYSICAL REVIEW B, 1981, 23 (10) :4946-4959

← 1 2 3 →