title: Lowest energy electronic transition in aqueous Cl(-) salts: Cl(-) → (H2O)6 charge transfer transition.
abstract: We use UV resonance Raman spectroscopy to probe the lowest energy allowed electronic transitions of aqueous solutions containing Cl(-) salts. We show that the waters hydrating the Cl(-) are involved in charge transfer transitions that transfer electron density from Cl(-) to the water molecules. These charge transfer transitions cause significant change in the H-O-H bond angle in the excited state, which results in a strong enhancement of the preresonance Raman intensity of the water bending modes. Our work gives the first insight into the lowest allowed electronic transition of hydrated Cl(-).
authors.affiliation: Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
authors.forename: Kan
authors.initials: K
authors.lastname: Xiong
authors.forename: Sanford A
authors.initials: SA
authors.lastname: Asher
mesh_terms: D002627:Chemistry, Physical; D002712:Chlorides / Q000737:chemistry*; D004579:Electron Transport; D004583:Electrons; D012492:Salts / Q000737:chemistry; D012996:Solutions; D013059:Spectrum Analysis, Raman; D055672:Static Electricity; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
chemical_list: D002712:Chlorides; D012492:Salts; D012996:Solutions; D014867:Water