Numéro
J. Phys. IV France
Volume 05, Numéro C5, Juin 1995
Proceedings of the Tenth European Conference on Chemical Vapour Deposition
Page(s) C5-221 - C5-228
DOI https://doi.org/10.1051/jphyscol:1995525
Proceedings of the Tenth European Conference on Chemical Vapour Deposition

J. Phys. IV France 05 (1995) C5-221-C5-228

DOI: 10.1051/jphyscol:1995525

Mass Spectrometric Study of Copper(II) β-Diketonates Vapour Thermolysis Mechanism and Kinetics

A.E. Turgambaeva, A.F. Bykov and I.K. Igumenov

Institute of Inorganic Chemistry, Lavrentieva 3, Novosibirsk 630090, Russia


Abstract
Vapour thermolysis processes of copper(II) bis-chelate complexes with different β-diketones in the 160-640°C temperature range were studied by using the high-temperature source of a molecular beam with mass spectrometric recording of the gas phase composition directly at the outlet from the thermal reactor. Schemes of a heterogeneous decomposition of these compounds vapour were suggested on the basis of temperature dependences of the thermolysis gaseous products composition. It was established that the mechanisms of thermal conversion of copper(II) complexes with fluorinated and non-fluorinated ligands were not similar. A comparison of the thermal behaviour of the complexes with fluorinated and non-fluorinated ligands in vacuum, hydrogen and oxygen was carried out. Effective values of kinetic parameters in the Arrhenius equation were calculated for the first-order reaction on initial compound from the temperature dependence of the rate constant. The sequence of copper(II) complexes with β-diketones having different end substituents according to the thermal stability was revealed from the values of the thermal decomposition activation energy.



© EDP Sciences 1995