Spectroscopic identification and structural characterization of Ag2H2− by mass-selected photoelectron velocity-map imaging
Abstract
Ag2H2- is identified and characterized by photoelectron velocity-map imaging and quantum chemical calculations. High-resolution mass selection unambiguously confirms the formation of Ag2H2-, yielding a vibrationally resolved spectrum with a distinct progression assigned to the Ag-H stretching mode. Comparison between experiment and theory shows that Ag2H2- adopts a distorted Y-shaped geometry with one bridging H and one terminal H, while for neutral Ag2H2, this geometry is a local minimum. Further bonding analysis of the corresponding neutral counterpart reveals that the unusually low Ag-H stretching frequency originates from synergistic donation and back-donation between the two AgH subunits.
Fields of Study & Subjects
Crystallography and molecular interactions
Advanced Chemical Physics Studies
Advanced Electron Microscopy Techniques and Applications
Publication details
- Journal / source
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Volume
- 164
- Issue
- 24
- Publication date
- 23 June 2026
- Language
- EN