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- W2056532359 abstract "The photoelectron spectra of small mass-selected aluminum-rich AlnCo− (n=8–17) and cobalt-rich ConAlm− clusters (n=6,8,10; m=1,2) are measured at photon energies of 3.49 eV with the aid of a magnetic bottle photoelectron spectrometer. The electronic structures of the bimetallic clusters are compared with those of pure Aln− and Con− clusters, which are measured under the same conditions. The threshold behavior (electron affinities and vertical detachment energies) is analyzed, and the application of the electronic shell model reveals a similar shell structure of Co-doped Al clusters with a single heteroatom. Additional heteroatom doping induces shell perturbations. Compared to pure Aln clusters, single-atom doped clusters show a hybridization of Al s, p and Co d orbitals resulting in a merging of spectral features at low binding energies. The evolution of the electronic structure is compared with reported ionization potentials [Menezes and Knickelbein, Chem. Phys. Lett. 183, 357 (1991); Z. Phys. D 26, 322 (1993)]. The hydrogen chemisorption behavior of neutral aluminum cobalt clusters [Nonose et al., Chem. Phys. Lett. 164, 427 (1989)] shows a clear influence of Co d states at low binding energies in the case of AlnCo, whereas for ConAlm clusters (n>m) the geometric effect becomes more dominant." @default.
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- W2056532359 date "2001-09-22" @default.
- W2056532359 modified "2023-09-27" @default.
- W2056532359 title "Photoelectron spectroscopy of bimetallic aluminum cobalt cluster anions: Comparison of electronic structure and hydrogen chemisorption rates" @default.
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- W2056532359 doi "https://doi.org/10.1063/1.1394944" @default.
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