Vibrational spectroscopy of C-60 and K-doped C-60 on Ag(111) by sum-frequency generation

被引：2

作者：

Caudano, Y

Peremans, A

Thiry, PA

Dumas, P

Tadjeddine, A

机构：

[1] CNRS,UTILISAT RAYONNEMENT ELECTROMAGNET LAB,F-91405 ORSAY,FRANCE

[2] CNRS,LASIR,F-94320 THIAIS,FRANCE

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1996年 / 29卷 / 21期

关键词：

D O I：

10.1088/0953-4075/29/21/016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The C-60/Ag(111) interface and the completely doped K/C-60/Ag(111) interface were studied by infrared reflection absorption (IRAS) and infrared-visible sum-frequency generation (SFG) spectroscopies. The combination of both techniques provides a powerful means for the determination of the infrared and/or Raman character of the adsorbate vibrations. Accordingly, we show that the vibration observed by IRAS in the 1100-1500 cm(-1) frequency range for the C60/Ag(111) interface is the A(g)(2) 'pentagonal pinch' mode of C-60, which is Raman active and infrared silent in the free molecule. We also observe vibrational frequency and infrared intensity modification of the normally Raman active Ap(2) and infrared active T-1u(4) modes upon K-doping.

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页码：5023 / 5031

页数：9

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