Structures and dynamics of molecules on liquid beam surfaces

In this review, we describe experimental studies on structures and dynamics of molecules on clean liquid surfaces in a vacuum. These studies use clean -surface preparations in combination with highly sensitive laser-, photoele ctron-, and mass-spectroscopic techniques. In particular, we refer to our r ecent studies on solvation structures and reactions on various solution sur faces using liquid beam-multiphoton ionization-mass spectrometry. These inc lude (a) aggregation of solute molecules on solution surfaces such as forma tion of solute pairs, clusters, and islands; and (b) chemical reactions ind uced by photoexcitation and -ionization, such as a nucleophilic reaction of phenyl ketones, polymerization of halo-anilines, and reduction of cations by solvated electrons.