Molecule-like and lattice vibrations in metal clusters.

ABSTRACT: We report distinct molecule-like and lattice (breathing) vibrational signatures of atomically precise, ligand-protected metal clusters using low-temperature Raman spectroscopy. Our measurements provide fingerprint Raman spectra of a series of noble metal clusters, namely, Au₂₅(SR)₁₈, Ag₂₅(SR)₁₈, Ag₂₄Au₁(SR)₁₈, Ag₂₉(S₂R)₁₂ and Ag₄₄(SR)₃₀ (-SR = alkyl/arylthiolate, -S₂R = dithiolate). Distinct, well-defined, low-frequency Raman bands of these clusters result from the vibrations of their metal cores whereas the higher-frequency bands reflect the structure of the metal-ligand interface. We observe a distinct breathing vibrational mode for each of these

SUBMITTER: Ramankutty KK 

PROVIDER: S-EPMC9176185 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature