Showing papers by "Wrocław University of Technology published in 1973"

Mass spectrometric studies on the sublimation of rubidium perrhenate

Abstract: The equilibrium sublimation of RbReO 4 over the temperature range 710–863 K has been studied. RbReO 4 was evaporated from single and double silica Knudsen cells and the effusing vapours were examined by means of a MI-1305 mass spectrometer specially adapted for high temperature studies. Molecules of RbReO 4 monomer and those of the dimer (RbReO 4 ) 2 were found in the vapours. The partial pressures of monomer and dimer, their sublimation heats and the heat of thermal dissociation of the dimer were determined.

Mass spectrometric studies on the vaporization of lithium perrhenate

Abstract: The equilibrium vaporization of LiReO4 over the temperature range 750–950 K has been studied. LiReO4 was evaporated from single and double Knudsen cells and the effusing vapours were examined by means of a MI-1305 mass spectrometer specially adapted for high temperature studies. Molecules of LiReO4 and of (LiReO4)2 were found in the vapours. The partial pressures and heats of vaporisation of monomer and dimer, and the heat of thermal dissociation of the dimer, were determined.

Combined hopping and tunneling mechanism of electron transport and doping effects in chloranil‐trimethylamine charge‐transfer complex

Abstract: A conduction model is proposed to account for the doping effects (diminution of the apparent resitivity and activation energy, over-ohmic current–voltage characteristics) observed in chloranil-trimethylamine CT complex when exposed to trimethylamine vapour It was assumed that electrons are transferred between impurity centres formed by chloranil anion-radicals by jumping over and/or by tunneling through the potential barriers between them The contribution from the two mechanisms depends on the doping level Ein Modell wird vorgeschlagen, um die Dotierungseffekte (Verminderung des scheinbaren Widerstandes und der scheinbaren Aktivierungsenergie, uberlineare Strom-Spannungs-Kennlinien) zu deuten, die man im Chloranil-Trimethylamin EDA-Komplex in Anwesenheit von uberschussigen Aminen beobachtet Es wird angenommen, das Elektronentransport sowohl durch Uberspringen als auch mittels Durchtunneln der Barrieren zwischen den benachbarten Chloranil-Anionradikalen zustandekommt Die relativen Anteile beider Mechanismen andern sich mit dem Dotierungsgrad