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  • 33.80.Eh  (2)
  • 82.30  (1)
  • PACS: 36.40.-c Atomic and molecular clusters – 33.20.Ea Infrared spectra – 61.46.+w Clusters, nanoparticles, and nanocrystalline materials  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Reaction of Aln clusters with oxygen and ammonia (1989)
    Springer
    The European physical journal 12 (1989), S. 571-573 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 82.30 ; 36.40
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Aluminum clusters were generated by a laser vaporization method. Ionization potential of Al2 was found to be lower than that of Al. In the reaction with oxygen at high concentration, the mixed cluster Al9O7 survives predominantly as a stable cluster. Ammonia was found to be adsorbed weakly on the Aln surface.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01427020
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  • 2
    Digitale Medien
    Digitale Medien
    Electronic structure and reactivity of Mg+(H2O) n cluster ions (1993)
    Springer
    The European physical journal 26 (1993), S. 180-182 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 36.40.+d ; 33.80.Eh
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Electronically excited states of magnesium-water cluster ions, Mg+(H2O) n ,n=1–5, are studied by photodissociation after mass selection. The observed photodissociation spectra are assigned to the2P–2S type transitions localized on the Mg+ ion with the aid of ab initio CI calculations. In addition to evaporation of water molecules, photoinduced intracluster reaction to produce MgOH+(H2O) n is found to occur efficiently, with pronounced size dependence. The intriguing features observed in the mass spectrum of nascent cluster ions are discussed in relation to the stepwise solvation of this reaction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01425657
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  • 3
    Digitale Medien
    Digitale Medien
    Photoionization and photodissociation studies on aluminum-water clusters and their ions (1993)
    Springer
    The European physical journal 26 (1993), S. 177-179 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 36.40.+d ; 33.80.Eh ; 33.20.Lg
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Clusters of aluminum atoms solvated with water molecules, Al(H2O) n , have been studied by one-photon ionization and time-of-flight mass spectroscopy. Characteristic feature is observed in the photoionization mass spectrum: The intensities of the product Al+(H2O) n ions are about one order of magnitude larger forn≤4 than forn≥5. The ionization potentials are determined forn up to 4. The obtained results are discussed in connection with the recent theoretical works. The photodissociation spectroscopy has also been applied to the Al+(H2O) n ions withn=1−10. The observed spectra are ascribed to the transition localized on the Al+ ion on the analogy of the results of Mg+(H2O) n photodissociation. The dissociation dynamics is also discussed from the fragmentation pattern with the aid of the recent theoretical work on the structure and stability of these ions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01425656
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  • 4
    Digitale Medien
    Digitale Medien
    Electronic spectra of solvated NH4 radicals NH4(NH3)n for n=1-6 (1999)
    Springer
    The European physical journal 9 (1999), S. 309-311 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS: 36.40.-c Atomic and molecular clusters – 33.20.Ea Infrared spectra – 61.46.+w Clusters, nanoparticles, and nanocrystalline materials
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. Electronic absorption spectra of NH4(NH3) n (n=1-6) were measured in the energy region of 4500–14000 cm-1. The spectra were assigned to the transition derived from a 3p 2F2-3s 2A1 Rydberg–Rydberg transition of NH4. A drastic decrease of excitation energy from the transition of NH4 (15062 cm-1) down to 5800 cm-1 for NH4(NH3)4 cluster was observed, while there was no clear difference for n=4, 5, and 6. Successive binding energies of NH4(NH3) n in the 3p-type state determined from the spectra were found to decrease monotonically with increasing n, in a similar manner to those of a positive ion, NH4 +. The drastic spectral change was ascribed to spontaneous ionization of NH4 in ammonia clusters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100530050445
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