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Updated: Jun 24, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Spectroscopic identification and structural characterization of Ag2H2- by mass-selected photoelectron velocity-map
Ya Li1, Xiaoying Chen2, Yonghong Yan2
1School of Geographical Sciences, Shanxi Normal University, No. 339, Taiyu Road, Taiyuan, Shanxi 030031, People's Republic of China.
None:
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.
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