Electron binding motifs in the (CS2)n- (n>4) cluster anions.
Photoelectron imaging spectroscopy of (CS(2))(n) (-), n>4, reveals a new state with an electron binding energy smaller than that of any of the corresponding CS(2) (-) and C(2)S(4) (-) states known to date. With support from ab initio calculations, two long-lived, metastable binding motifs with small electron binding energies are discussed for these clusters. The first is a solvent network permeating state, where the excess electron is delocalized over a number of linear CS(2) molecules. The second is an excited (2)B(1) state of the core CS(2) (-) anion stabilized at a slightly bent geometry by the solvation interactions. Based on the observed solvation-induced shifts in binding energy, the second motif is favored.
Habteyes
Terefe
T
Department of Chemistry, University of Arizona, Tucson, Arizona 85721-0041, USA.
Sanov
Andrei
A