Bonn M, Hess C, Miners J H, Heinz T F, Bakker H J, Cho M
Leiden Institute of Chemistry, P.O. Box 9502, 2300 RA Leiden, The Netherlands.
Phys Rev Lett. 2001 Feb 19;86(8):1566-9. doi: 10.1103/PhysRevLett.86.1566.
A novel type of surface vibrational sum-frequency generation spectroscopy is presented that enables a highly specific measurement of the coupling of molecules on surfaces. With this doubly vibrationally resonant technique, two-dimensional vibrational spectroscopy of molecules on surfaces becomes possible. The technique is demonstrated for the C-O stretch vibration of CO on a ruthenium (001) surface. It allows for the determination of the intermolecular coupling strength of dipole-coupled CO molecules on the surface.
本文提出了一种新型的表面振动和频产生光谱技术，该技术能够对表面分子的耦合进行高度特异性测量。利用这种双振动共振技术，表面分子的二维振动光谱成为可能。该技术在钌（001）表面上一氧化碳的C-O伸缩振动中得到了验证。它可以确定表面上偶极耦合一氧化碳分子的分子间耦合强度。
