Photoelectron images of atomic ions and copper mono- and diamine anions recorded at 800 and . The images in the left column are for (a) , (c) , and (e) obtained at , while the images in the right column (b) , (d) , and (f) are acquired using . The laser polarization is linear and coincides with the vertical axis in the image plane. The images are taken with the same imaging conditions. The relative sizes of the raw photoelectron images are kept the same in the figure. Hence the size of the electronic bands can be used to compare the relative kinetic energies of the detached electrons from the different anions. The higher the kinetic energy of the detached electron, the larger the diameter of the electronic band in the photoelectron image. Band marks the detachment of anion and band is the higher binding energy feature of at .
Photoelectron images of atomic ions and silver mono- and diamine anions recorded at 800 and . The images in the left column are for (a) , (c) and (e) obtained at . The images in the right column (b) , (d) , and (f) are acquired using photons of wavelength . The photoelectron images are recorded using the same imaging conditions. The laser polarization is parallel to the vertical axis in the image plane. The electronic band from the detachment of anion is denoted by band .
(a) The photoelectron image of the detachment of using . (b) The basis set expansion reconstructed image (Ref. 40). (c) The photoelectron energy spectrum obtained from the reconstructed photoelectron image of at . The outer ring is the lower binding energy feature and corresponds to the transition. The two inner rings correspond to the higher binding energy peaks and result from the spin-orbit coupled and transitions, where the electron binding energy of the state is higher than that of the state (Ref. 49).
The photoelectron spectra of the Cu and Ag mono- and diamine anions obtained using photons of 800 and wavelength are shown in the figure. The spectra are normalized and plotted against the electron binding energy scale relevant to the respective wavelength. The dashed line is used for plotting the spectra of the Cu species while the solid line is used for the Ag species. The left and right columns depict the photoelectron spectra of and and their mono- and diamine anions recorded at 800 and , respectively. The plots (a) and (b) are for and atomic ions, (c) and (d) for Cu and Ag monoamine anions, and (e) and (f) for Cu and Ag diamine anions. The two vertical lines, dashed and dotted, mark the electron affinities of and atomic ions, respectively.
The figure shows the lowest-energy structures of (a) anion, (b) neutral, (c) anion, and (d) neutral. The plots (e) and (f) depict the highest occupied molecular orbital (HOMO) of the and anions, respectively.
The vertical detachment energies (eV) and the anisotropy parameters of the copper and silver mono- and diamine anions obtained from the reconstructed photoelectron images. The values of the anisotropy parameters determined from the images at 800 and for each of , , , and anions are reported. The significantly lower values of the anisotropy parameters of the and anions determined at are attributed to the isotropic distribution near the detachment threshold.
Interatomic distances (Å) rounded off to the third decimal place, the angles (deg) rounded off to the first decimal place of the lowest-energy structures, and the calculated electron affinities of the Cu mono- and diamines obtained from ab initio calculations.
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