Near-Infrared Spectrum of the First Excited State of Au₂.

ABSTRACT: Au₂ ⁺ is a simple but crucial model system for understanding the diverse catalytic activity of gold. While the Au₂ ⁺ ground state (X² Σ_g ⁺ ) is understood reasonably well from mass spectrometry and computations, no spectroscopic information is available for its first excited state (A² Σ_u ⁺ ). Herein, we present the vibrationally resolved electronic spectrum of this state for cold Ar-tagged Au₂ ⁺ cations. This exceptionally low-lying and well isolated A² Σ_(u) ⁺ ←X² Σ_(g) ⁺ transition occurs in the near-infrared range. The observed band origin (5738 cm^-1 , 1742.9 nm, 0.711 eV) and harmon

SUBMITTER: Forstel M 

PROVIDER: S-EPMC8596823 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature