Raman Spectra of Gases

Watching Visible Light-Driven CO2 Reduction on a Plasmonic Nanoparticle Catalyst

“…Several instances of adsorbed CO 2 were detected in our studies, evident by the appearance of ν – and ν + Fermi resonance modes that result from the coupling of the first overtone of the δ OCO bending mode and the symmetric ν s CO stretching vibration. Across various NPs, the ν – and ν + mode frequencies were centered around 1270 ± 10 and 1380 ± 20 cm –1 , respectively (Figures f and a). , The close agreement with the Fermi resonance modes of gas phase CO 2 , indicates that the detected CO 2 is in a physisorbed form with near-linear, undistorted geometry, as further confirmed by the DFT-computed spectrum of physisorbed CO 2 on Ag (Figure a) and calculations of the Fermi resonance dyad (Table S3).…”

“…Across various NPs, the ν − and ν + mode frequencies were centered around 1270 ± 10 and 1380 ± 20 cm −1 , respectively (Figures 1f and 2a). 50,51 The close agreement with the Fermi resonance modes of gas phase CO 2 50,51 indicates that the detected CO 2 is in a physisorbed form with near-linear, undistorted geometry, as further confirmed by the DFT-computed spectrum of physisorbed CO 2 on Ag (Figure 3a) and calculations of the Fermi resonance dyad (Table S3).…”

Some Physical Aspects of Atomic Linkages.

“…(101,102,103,104). The middle vibration shown in eachT h i s c o n t e n t i s o n l y l i c e n s e d f o r c o n s u i v i d u a l n o t d i r e c t l y a s s o c i a t e d w i t h s c i t e i s p r o h i b i t e d .…”