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Inclusion compounds as sources of activated mixed oxides

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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 (t conv) 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 (t max), where oxides (or metalic Ag form) are already forming. Up tot conv the decomposition process can be regarded as reversible, betweent conv andt max as irreversible. The oxides obtained att max exhibit different properties than oxides prepared by the normal dehydration of hydroxides.

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Bubanec, J., Sopková, A. & Janák, G. Inclusion compounds as sources of activated mixed oxides. J Incl Phenom Macrocycl Chem 17, 329–344 (1994).

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Key words

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