Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

The beam scattering method was used to investigate non-dissociative single-electron charge transfer between the molecular dication CO₂²⁺ and Ar or Ne at several collision energies between 3-10 eV (centre-of-mass, c.m.). Relative translational energy distributions of the product ions showed that in the reaction with Ar the CO₂⁺ product was mainly formed in reactions of the ground state of the dication, CO₂²⁺(X³Σ_g^-), leading to the excited states of the product CO₂⁺(A²Π_u) and CO₂⁺(B²Σ_u⁺). In the reaction with Ne, the largest probability had the process from the reactant dication excited state CO₂²⁺(¹Σ_g⁺) leading to the product ion ground state CO₂⁺(X²Π_g). Less probable were processes between the other excited states of the dication CO₂²⁺, (¹∆_g), (¹Σ_u^-), (³∆_u), also leading to the product ion ground state CO₂⁺(X²Π_g). Using the Landau-Zener model of the reaction window, relative populations of the ground and excited states of the dication CO₂²⁺ in the reactant beam were roughly estimated as (X³Σ_g):(¹∆_g):(¹Σ_g⁺):(¹Σ_u^-):(³∆_u) = 1.0:0.6:0.5:0.25:0.25.

Keywords: Charge transfer; Dications; Energetics; Electronic state population; Beam scattering; Carbon dioxide; Noble gases.

References: 24 live references.