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Inclusion compounds as sources of activated mixed oxides

  • Ján Bubanec
  • Anna Sopková
  • Gabriel Janák
Article

Abstract

The reactivity of products or intermediates produced by the total or partial thermal decomposition of Hofmann type and related cyanocomplexes with general formula [M(B) m ] P [M′(CN)4] q ·nG (M=Ni, Cu, Zn, Co, Ag; M′=Ni, Pt; G=C6H6, C6H5OH, H2O;n>0) are studied. The changes in GC sorptive properties against organic compounds, in the morphology and electrical conductivity and capacitance are correlated with the final products and different intermediates. Sharp changes of these properties occur at characteristic temperatures. The sorptive properties may be observed up to a temperature (tconv) at which some changes of properties in the compounds start and where stronger changes in morphology and some electrical properties start. The latter became more significant at a temperature of about 500–600°C (tmax), where oxides (or metalic Ag form) are already forming. Up totconv the decomposition process can be regarded as reversible, betweentconv andtmax as irreversible. The oxides obtained attmax exhibit different properties than oxides prepared by the normal dehydration of hydroxides.

Key words

Inclusion compounds cyanocomplexes thermal decomposition products electron microscopic observation electrical conductivity and capacitance topotactic reactions 

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References

  1. 1.
    J.L. Atwood, J.E.D. Davies, and D.D. Mac Nicol (Eds.):Inclusion Compounds, Vols. 1–5, Oxford University Press (1991).Google Scholar
  2. 2.
    H. Bauer and G. Schwarzenbach:Helv. Chim. Acta. 43, 842 (1960).Google Scholar
  3. 3.
    A. Sopková and J. Bubanec:J. Mol. Struct. 75, 73 (1981).Google Scholar
  4. 4.
    J. Bubanec:Dissertation, Chemical Faculty, Slovak Technical University, Bratislava (1986).Google Scholar
  5. 5.
    J. Bubanec and A. Sopková:J. Incl. Phenom. 6, 221 (1988).Google Scholar
  6. 6.
    A. Sopková, F. Kalavský, M. Šingliar, J. Bubanec, and P. Králik:Chem. Papers 40, 735 (1986).Google Scholar
  7. 7.
    J. Bubanec, A. Sopková, and G. Janák:Chemické listy 84, 87 (1990).Google Scholar
  8. 8.
    G. Brauer:Handbuch der Präparativen Anorganische Chemie, Zweiter Band, Ferdinand Enke Verlag Stuttgart (1962).Google Scholar
  9. 9.
    A. Sopková, M. Šingliar, and P. Králik:J. Incl. Phenom. 1, 263 (1984).Google Scholar
  10. 10.
    M. Šingliar and A. Sopková:Chem. Papers 40, 595 (1986).Google Scholar
  11. 11.
    M. Šingliar, A. Sopková, and J. Bubanec:Czechoslov. Appl. 251957 (1989).Google Scholar
  12. 12.
    A. Sopková, M. Šingliar, and J. Matanin:Abstract Book: III. International Symposium on Clathrate Compounds and Molecular Inclusion Phenomena, Tokyo, July 23–27, p. 279 (1984).Google Scholar
  13. 13.
    F.M. Nelson and F.T. Egertson:Anal. Chem. 30, 1387 (1958).Google Scholar
  14. 14.
    R. Kuroda and Y. Sasaki:Acta Crystallogr. B 30, 687 (1974).Google Scholar
  15. 15.
    D. Babel and K. Seitz: unpublished.Google Scholar
  16. 16.
    K. Seitz:Diploma Thesis, Philipps-Universität, Marburg (1986).Google Scholar
  17. 17.
    A.F. Wells:Structural Inorganic Chemistry, Fifth edition, Clarendon Press, Oxford (1984).Google Scholar
  18. 18.
    W.J. Moore:Physical Chemistry, Prentice-Hall (1972).Google Scholar
  19. 19.
    D.E. Wiliams and P.T. Moseley:J. Mater. Chem. 1, 809 (1991).Google Scholar
  20. 20.
    J.J. Burton and R.L. Garten:Advanced Materials in Catalysis, Academic Press, London (1977).Google Scholar
  21. 21.
    SY-LAB Vertriebsgesellschaft, Purkersdorf, Austria, unpublished results.Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Ján Bubanec
    • 1
  • Anna Sopková
    • 1
  • Gabriel Janák
    • 2
  1. 1.Department of Inorganic Chemistry, Faculty of SciencesUniversity P.J. ŠafárikKošiceSlovakia
  2. 2.Technical UniversityKošiceSlovakia

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