Abstract
Application of vibrational SFG (sum frequency generation) spectroscopy has been made to the study of the adsorption product of formic acid(HCOOH) on clean MgO(001) surface. The observed (CH) frequency of 2870 cm −1 revealed that the adsorbed species are formate (HCOO −), and the analysis made on the polarization characteristics of signal intensity led to the conclusion that CH bonds stand perpendicular to the surface with rather broad distribution width of tilt angle: φ=0±30°. Formulas for the analysis have been presented.
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