Analysis of the E-X and C-X band system isotopically enriched of Ag2

Biosynthesized Ag/α-Al2O3 catalyst for ethylene epoxidation: the influence of silver precursors

“…5, obvious absorption band at $200 nm aroused by the electron transition of 4d 10 -4d 9 5s 1 from the highly dispersed Ag + on the support, 26 emerged on both Ag/ a-Al 2 O 3 -n and Ag/a-Al 2 O 3 -a catalysts, indicating that AgNO 3 and [Ag(NH 3 ) 2 ] + precursors were not reduced completely. Absorption band at 250-260 nm, attributed to the electron transition of 4d 10 5s 1 -4d 9 5s 1 5p 1 , 4d 10 5s 1 -4d 9 5s 1 6p 1 or 5s 1 -5p 1 from metallic Ag, [27][28][29] was observed on the three catalyst, indicating the existence of Ag 0 on them. Ag/a-Al 2 O 3 -en catalyst (Fig.…”

Multiphoton ionization of Ag2: Assessment of a new excited electronic state and resolution of the Ag2 ionization potential

“…Absorption experiments have identified the strong electronic transitions from the ground state of silver dimer, 1,8,9 however, using resonant two photon ionization techniques, we identify a new, weakly absorbing excited electronic state of silver dimer which has a significant impact on the laser based determination of the ionization potential. This state lies in near perfect double resonance with the A 1 ⌺ u ϩ (vЈϭ3)←X 1 ⌺ g ϩ (vЉϭ0) transition, resulting in an intense single color resonance at the A(vЈϭ3)←X(vЉϭ0) transition wavelength ͑ϳ427 nm͒.…”

“…The combination of a strong A 1 ⌺ u ϩ ←X 1 ⌺ g ϩ transition and the strongly allowed transition from the A state to the new upper F state would imply that a direct transition from the ground state to this F state should be inversion symmetry forbidden, consistent with previous absorption studies which show no evidence for the state. 8,9 In order to obtain direct evidence for the F state, the output from the PDL-3 dye laser ͑Exalite 428 dye͒ was frequency doubled using a BBO crystal to yield tunable ultraviolet radiation in a narrow wavelength range about 213 nm, the expected absorption wavelength for the F state ͓Fig. 3͑d͔͒.…”

Geometrical and Electronic Structures of Gold, Silver, and Gold−Silver Binary Clusters: Origins of Ductility of Gold and Gold−Silver Alloy Formation

“…Although much of the experimental and theoretical work so far has been done on pure gold and silver clusters and nanoparticles, − much less is known about the geometrical structures and energetics of binary clusters. These nanoclusters are expected to exhibit interesting electronic and spectral properties, which dramatically change with their sizes.…”