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  • Springer  (4)
  • 1985-1989  (4)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Dynamic local field correction in the calculation of electronic stopping power (1985)
    Springer
    The European physical journal 321 (1985), S. 221-223 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy loss of slow protons in a degenerate electron gas is calculated on the basis of the dielectric theory. The influence of static and dynamic local field corrections is examined. Comparison with well defined experimental data is made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01493441
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  • 2
    Electronic Resource
    Electronic Resource
    Nature of the cherry-red transient formed during the interaction of osmium tetroxide with hydrogen peroxide (1986)
    Springer
    Transition metal chemistry 11 (1986), S. 319-320 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A cherry-red transitory coloration is formed when OsO4 or osmium(VI) is added to alkaline hydrogen peroxide solution in the pH range 9–13. The transient has an absorption maximum at 530 nm and its concentration depends on the pH of reaction mixture reaching a maximum at pH 10.5–11. The transient is designated as a peroxo-derivative of osmium(VIII) [or an osmium(VII) — Superoxide radical pair if the peroxoderivative undergoes a fast intramolecular one-electron transfer]. Many decades ago it was observed1 that a cherry-red coloration appears transiently when osmium tetroxide solution is added to alkaline hydrogen peroxide solution. However, to our knowledge, there are no literature data about the nature of this transient. Further, we observed recently that there is a close connection between the rate of decomposition of hydrogen peroxide catalysed by osmium tetroxide and the intensity of the coloration, and therefore an attempt was made to investigate the transient by using a fast spectrophotometer technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620656
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  • 3
    Electronic Resource
    Electronic Resource
    Peroxide derivatives of molybdenum(VI) in neutral and alkaline media (1989)
    Springer
    Transition metal chemistry 14 (1989), S. 90-94 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The peroxidation of molybdenum(VI) was investigated in neutral and alkaline media. The stability constants of the peroxo complexes were determined by spectrophotometric measurement as (9.12±0.67)×10−7, (2.68±0.17) ×105, (1.26±0.06)×106 and (1.58±0.02) for the 1∶1, 2∶1 (yellow), 3∶1 and 4∶1 (red) species. The diperoxomolybdate disproportionates into the tetraperoxo derivative when treated with alkali. Formation of the tetraperoxo complex was found to be pH dependent according to a curve, with maximum at pH 10. Acidification of tetraperoxomolybdate solution results in the regeneration of hydrogen peroxide and the diperoxo complex is reformed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01040598
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  • 4
    Electronic Resource
    Electronic Resource
    Peroxide derivatives of molybdenum(VI) in acidic solution (1989)
    Springer
    Transition metal chemistry 14 (1989), S. 298-302 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The peroxidation of molybdenum(VI) in dilute acidic solution was investigated by spectrophotometric, potentiometric and conductometric methods. At lower concentrations of hydrogen peroxide, diperoxo-and then hexaperoxoheptamolybdate are formed, whereas at higher concentrations, the peroxidized polyions progressively desaggregate and diperoxomonomolybdate is formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01098234
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