Authors: Todorovsky, Dimitr S.; Getsova, Miroslava M.; Milanova, Maria M.; Kakihana, Masato; Petrova, Nikolina L.; Arnaudov, Michail G.; Enchev, Venelin G.

Source: Canadian Journal of Chemistry, Volume 85, Numbers 7-8, July 2007 , pp. 547-559(13)

Publisher: NRC Research Press

Abstract:

The composition, some spectral characteristics, and thermal decomposition of solid lanthanide-titanium (lanthanide (Ln) = Y, La, Ce) and lanthanide-titanium citrates (CA) and tartrates (TA) have been studied. The complexes have been prepared in ethylene glycol medium at conditions modeling those of the polymerized-complex method applied for Ln₂Ti₂O₇ preparation. Special attention has been paid to the chemical nature of the bimetallic products as well as to the factors influencing the deprotonation of the alcoholic OH groups of the acidic ligands. The results contribute to further elucidation of the complexation and thermal decomposition processes involved in the polymerized-complex method.Key words: inorganic compounds, sol-gel chemistry, infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis (TGA).

On a étudié la composition, quelques caractéristiques spectrales et la décomposition thermique de dérivés solides lanthanide-titane (lanthanide (Ln) = Y, La, Ce) et de citrates et tartrates de lanthanide-titane. On a préparé les complexes dans de l'éthylèneglycol, dans des conditions qui imitent celles de la méthode du complexe polymérisé appliquée à la préparation du Ln₂Ti₂O₇. On a porté une attention particulière à la nature chimique des produits bimétalliques ainsi qu'aux facteurs qui influencent la déprotonation des groupes OH alcooliques des ligands acidiques. Les résultats contribuent à une meilleure compréhension des processus de complexation et de décomposition thermique impliqués dans la méthode du complexe polymérisé.Mots-clés : composés inorganiques, chimie gel-sol, spectroscopie infrarouge, résonance magnétique nucléaire, analyse thermogravimétrique (ATG).[Traduit par la Rédaction]

Document Type: Research article

Publication date: 2007-07-01

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• In this Subject: Chemistry (General) ,  Inorganic Chemistry ,  Organic Chemistry
• By this author: Todorovsky, Dimitr S. ;  Getsova, Miroslava M. ;  Milanova, Maria M. ;  Kakihana, Masato ;  Petrova, Nikolina L. ;  Arnaudov, Michail G. ;  Enchev, Venelin G.

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