Trapping-site effects in resonance Raman spectra of Ag 2 molecules isolated in rare-gas matrices

Abstract

The trapping sites of Ag 2 molecules in rare-gas matrices are characterized by their vibrational modes as measured by resonance Raman scattering. Low-energy modes that form combination bands with the Ag 2 stretching vibration are identified as external localized or resonant modes of the molecule. The disputed absorption band at 443 nm in argon matrices is shown to be due to Ag 2. The absorption band at 356 nm in neon matrices is correlated with a 180.8 cm −1 vibrational band. Possible lattice sites of disilver in rare-gas matrices are briefly discussed.