Datensatz

Zusammenfassung

We report an intense broadband midinfrared absorption band in the Au₁₀⁺ cluster in a region in which only molecular vibrations would normally be expected. Observed in the infrared multiple photon dissociation spectra of Au₁₀Ar⁺, Au₁₀(N₂O)⁺, and Au₁₀(OCS)⁺, the smooth feature stretches 700–3400  cm^-1 (λ=14–2.9  μm). Calculations confirm unusually low-energy allowed electronic excitations consistent with the observed spectra. In Au₁₀(OCS)⁺, IR absorption throughout the band drives OCS decomposition resulting in CO loss, providing an alternative method of bond activation or breaking.