The UV Photodissociation Spectrum of FeOH⁺: Electronic Insight into the Simplest Iron Hydroxide Complexes.

ABSTRACT: FeOH⁺ has been proposed to exist in cold interstellar environments due to the high cosmic abundance of hydrogen, oxygen, and iron. In this study, we report the UV photodissociation spectrum of FeOH⁺ in the photon energy range 2.5-5.9 eV, complemented by high-level quantum chemical calculations. Previous studies focused on determining the bond dissociation energy of FeOH⁺ through measuring the threshold energy for its photodissociation into Fe⁺ and OH. Our observed photodissociation threshold of 3.47 ± 0.02 eV is an upper limit for the Fe⁺-OH bond dissociation energy and agrees within error limits with recent collision-induced dissociation data. In addition, the spectra provide insight into electronically excited states and quantitative

SUBMITTER: Jin S 

PROVIDER: S-EPMC12641485 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature