Infrared Spectroscopy of Size-Selected Hydrated Carbon Dioxide Radical Anions CO₂ ^.- (H₂ O)_n (n=2-61) in the C-O Stretch Region.

ABSTRACT: Understanding the intrinsic properties of the hydrated carbon dioxide radical anions CO₂ ^.- (H₂ O)_n is relevant for electrochemical carbon dioxide functionalization. CO₂ ^.- (H₂ O)_n (n=2-61) is investigated by using infrared action spectroscopy in the 1150-2220 cm^-1 region in an ICR (ion cyclotron resonance) cell cooled to T=80 K. The spectra show an absorption band around 1280 cm^-1 , which is assigned to the symmetric C-O stretching vibration ν_s . It blueshifts with increasing cluster size, reaching the bulk value, within the experimental linewidth, for n=20. The antisymmetric C-O vibration ν_as is strongly coupled with the water bending mode ν₂ , ca

SUBMITTER: Herburger A 

PROVIDER: S-EPMC6771497 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature