We report the anion photoelectron spectra of I-2(-)(CO2)(n) clusters (n=1-8) measured at a photon energy of 4.661 eV. Assignment of the spectra is aided by electronic structure calculations on I-2(-)(CO2). The experiment yields size-dependent vertical and adiabatic detachment energies for the formation of the ground state and low-lying valence-excited states of the neutral cluster. Vertical detachment energies are successively blueshifted with increasing cluster size, indicating a stronger stabilization of the anionic cluster relative to the neutral counterpart. In addition, a short progression in the CO2 bending mode is observed in the n=1 and 2 clusters, indicating that the CO2 solvent species are slightly bent (similar to2.5degrees) in the anion clusters. The trends in the total and stepwise solvation energies are discussed in terms of cluster geometries solute-solvent interactions.