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• W2042164562 endingPage "9709" @default.
• W2042164562 startingPage "9704" @default.
• W2042164562 abstract "We examine the resonance Raman spectroscopy of the heteronuclear dimers VCo and VFe, using a mass-selected cluster source. Cluster cations are produced in a sputtering source and mass filtered with a Wien filter, then neutralized and deposited in an Ar matrix at low temperatures. For VCo we obtain the resonance Raman spectra in Ar matrix excited with 457.9, 488.0, 496.5, 501.7, and 514.5 nm laser lines. We observe Raman shifts of 459 and 916 cm−1, and we assign these lines to the fundamental and first overtone of the ground state. The resulting force constant is ke=3.42 mdyne/Å. Resonance Raman spectra of VFe, obtained at the same five excitation wavelengths, display Raman shifts at 423 and 836 cm−1, and we assign these to the fundamental and first overtone of the ground-state vibration. The resulting force constant is ke=2.94 mdyne/Å. We compare these observed force constants and configurations with those of other V–X dimers (X=Ti–Ni), as well as related isoelectronic species. The value for VFe, with 13 valence electrons, is considerably lower than its neighbors. This molecule most likely has a Σ+2 ground state, stemming from a (3dσ)2(3dπ)4(3dδ)4(4sσ)2(4sσ*)1 configuration. The higher force constant for VCo with 14 valence electrons indicates either a (3dσ)2(3dπ)4(3dδ)4(3dδ*)2(4sσ)2 configuration with a Σ3 state, or a (3dσ)2(3dπ)4(3dδ)4(3dδ*)1(4sσ)2(4sσ*)1 configuration with a Δ3 state." @default.
• W2042164562 created "2016-06-24" @default.
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• W2042164562 date "2003-05-14" @default.
• W2042164562 modified "2023-09-26" @default.
• W2042164562 title "Spectroscopy of mass-selected VCo and VFe in argon matrices" @default.
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• W2042164562 doi "https://doi.org/10.1063/1.1571523" @default.
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