Chemical reactions involving multi-solvated electrons on liquid beam surface of CaI2 alcohol solutions

A continuous liquid flow (a liquid beam) of a calcium iodide (Cal(2)) solution in ethanol (EtOH) in a vacuum was irradiated with a UV laser at different wavelengths and powers. Product ions ejected from the solution surface following multiphoton excitation via the charge-transfer-to-solvent (CTTS) band of I- were analyzed by a time-of-flight mass spectrometer. Under irradiation of the laser at a weak power, solvated cluster ions CaOEt+ (EtOH)(m) (m = 0-6), CaOH+ (EtOH)(m) (m = 0-1), and CaI+ (EtOH)(m) (m = 0-6) (Class I) were found to be produced, whereas at an intense power, cluster ions containing neutral salts, [Ca-n(OEt)(i)(OH)(j-)(O)(k)(I)(l)](+) (Class Ii), were produced additionally. The relative abundances of the cluster ions of Class II increased as the irradiation laser power increased. The abundance was particularly high when the excitation laser was resonant to the CTTS band. It was concluded that more than one solvated electrons participate in the production of the Class II cluster ions.