Bonn M, Hess C, Funk S, Miners JH, Persson BN, Wolf M, Ertl G
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
Phys Rev Lett. 2000 May 15;84(20):4653-6. doi: 10.1103/PhysRevLett.84.4653.
Using time-resolved sum-frequency generation spectroscopy, the C- O stretch vibration of carbon monoxide adsorbed on a single-crystal Ru(001) surface is investigated during femtosecond near-IR laser excitation leading to desorption. A large transient redshift, a broadening of the resonance, and a strong decrease in intensity are observed. These originate from coupling of the C- O stretch to low-frequency modes, especially the frustrated rotation, that are highly excited in the desorption process.
利用时间分辨和频产生光谱，研究了在飞秒近红外激光激发导致脱附过程中，吸附在单晶Ru(001)表面的一氧化碳的C - O伸缩振动。观察到一个大的瞬态红移、共振展宽以及强度的强烈降低。这些现象源于C - O伸缩与低频模式的耦合，特别是在脱附过程中被高度激发的受阻旋转。
