Study on Cr(acac)<sub>3</sub> Thermolysis at SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> Surfaces by Temperature Programmed Desorption Mass Spectrometry

Authors

  • L. O. Davydenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • B. G. Mischanchuk Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • A. G. Grebenyuk Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • V. O. Pokrovskiy Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Yu. V. Plyuto Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine

Abstract

The mechanism of thermolysis of chromium (III) acetylacetonate Cr(acac)3 molecules adsorbed on silica and alumina surfaces has been studied by temperature programmed desorption mass spectrometry. It has been found that the thermolysis of Cr(acac)3 on silica surface occurs due to substitution of the support hydroxyl groups for hydrogen bonded ligands and dimerization of free acetylacetonate ligands by migration of hydrogen atom of methyl group to oxygen atom of enol and carbonyl groups followed by decomposition of dimeric macroligands and single acetylacetonate ligands with elimination of small molecules. The thermolysis of Cr(acac)3 on alumina surface occurs due to dimerization of free acetylacetonate ligands via migration of hydrogen atom of methyl group to oxygen atom of carbonyl group followed by decomposition of dimeric macroligands and single acetylacetonate ligands with elimination of small molecules.

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(1)
Davydenko, L. O.; Mischanchuk, B. G.; Grebenyuk, A. G.; Pokrovskiy, V. O.; Plyuto, Y. V. Study on Cr(acac)<sub>3< sub> Thermolysis at SiO<sub>2< sub> and Al<sub>2< sub>O<sub>3< Sub> Surfaces by Temperature Programmed Desorption Mass Spectrometry. Him. Fiz. Tehnol. Poverhni 2012, 3, 273-282.

Issue

Vol. 3 No. 3 (2012): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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