Synthèse, structure cristalline et réactivité de nouveaux matériaux inorganiques poreux

Abstract

Quatre nouveaux composés [Y(H2O)6(C4O4)(HC4O4).H2O], [Y4(H3O)4(C2O4)8. 16(H2O)], Fe2Cl4(C2O4)3(C6H14N2)2.2H2O et (In2(C4O4)3.8H2O) ainsi que ([M(C4O4)(OH) (H2O)2]22H2O (M = Al, Ga) isotype de [Fe(C4O4)(OH)(H2O)2]22H2O (J.T. Wrobleski et D.B. Brown, 1978), Y2(C2O4)3.2H2O (D. Louer, 1990), Y2(C4O4)3.8H2O (E. Huskwska, 1992), [In2(C2O4)3(H2O)3]•7H2O] (N. Audebrand, 2002) et [In(C4H12N2)(C2O4).xH2O] (N. Audebrand), ont été préparés par voie chimie douce en utilisant des unités de construction organique et inorganique. Les structures cristallines de ces composés ont été étudiées à partir des données de diffraction des rayons X par la poudre et par le monocristal. La microanalyse par spectroscopie à dispersion d’énergie a été utilisée pour la recherche qualitative des éléments chimiques dans les échantillons. Les réactions dans les milieux acide et/ou différent température dans certain cas, entraine la décomposition des réactifs donnants lieux à la formation de l’anion oxalate. La dégradation thermique de Fe2Cl4(C2O4)3(C6H14N2)2.2H2O a été étudié par TG et a conduit à la formation du fer pur sous sa forme bainite. La modélisation de la molécule Y(H2O)6(C4O4)(HC4O4).H2O a été réalisé par le logiciel HyperChem 08 et avait servit pour la comparaison de la structure de ce complexe avec le composé de formule Eu(H2O)6(C4O4)(HC4O4).H2O. Les résultats de cette étude ont été comparés à ceux rapportés dans les publications pour les composés Y(H2O)6(C4O4)(HC4O4).H2O et [Y4(H3O)4(C2O4)8.16(H2O)] de la même famille.ABSTRACT : Four new compounds [Y(H2O)6(C4O4)(HC4O4).H2O], [Y4(H3O)4(C2O4)8. 16(H2O)], Fe2Cl4(C2O4)3(C6H14N2)2.2H2O and (In2(C4O4)3.8H2O) as well as ([M(C4O4)(OH) (H2O)2]22H2O (M = Al, Ga) isotype de [Fe(C4O4)(OH)(H2O)2]22H2O (J.T. Wrobleski et D.B. Brown, 1978), Y2(C2O4)3.2H2O (D. Louer, 1990), Y2(C4O4)3.8H2O (E. Huskwska, 1992), [In2(C2O4)3(H2O)3]•7H2O] (N. Audebrand, 2002) and [In(C4H12N2)(C2O4).xH2O] (N. Audebrand), were prepared by soft chemistry in using organic and inorganic construction units. The crystalline structures of these compounds were investigated from X-ray diffraction data by powder and single crystal. Microanalysis by energy dispersive spectroscopy was used for research qualitative chemical elements in the samples. Reactions in acidic media and/or different temperature in some cases lead to the decomposition of the reagents giving rise to the formation of the oxalate anion. Thermal degradation of Fe2Cl4(C2O4)3(C6H14N2) ) 2.2H2O was studied by TG and led to the formation of pure iron in its bainite form. The modelization of the molecule [Y(H2O)6(C4O4)(HC4O4).H2O] was carried out by the software HyperChem 08 and served to compare the structure of this complex with the compound of formula [Eu (H2O)6(C4O4)(HC4O4).H2O]. The results of this study were compared with those reported in the literature for compounds Y(H2O)6(C4O4)(HC4O4) .H2O and [Y4(H3O)4(C2O4)8.16(H2O)] of the same family.

Four new compounds [Y(H2O)6(C4O4)(HC4O4).H2O], [Y4(H3O)4(C2O4)8. 16(H2O)], Fe2Cl4(C2O4)3(C6H14N2)2.2H2O and (In2(C4O4)3.8H2O) as well as ([M(C4O4)(OH) (H2O)2]22H2O (M = Al, Ga) isotype de [Fe(C4O4)(OH)(H2O)2]22H2O (J.T. Wrobleski et D.B. Brown, 1978), Y2(C2O4)3.2H2O (D. Louer, 1990), Y2(C4O4)3.8H2O (E. Huskwska, 1992), [In2(C2O4)3(H2O)3]·7H2O] (N. Audebrand, 2002) and [In(C4H12N2)(C2O4).xH2O] (N. Audebrand), were prepared by soft chemistry in using organic and inorganic construction units. The crystalline structures of these compounds were investigated from X-ray diffraction data by powder and single crystal. Microanalysis by energy dispersive spectroscopy was used for research qualitative chemical elements in the samples. Reactions in acidic media and/or different temperature in some cases lead to the decomposition of the reagents giving rise to the formation of the oxalate anion. Thermal degradation of Fe2Cl4(C2O4)3(C6H14N2) ) 2.2H2O was studied by TG and led to the formation of pure iron in its bainite form. The modelization of the molecule [Y(H2O)6(C4O4)(HC4O4).H2O] was carried out by the software HyperChem 08 and served to compare the structure of this complex with the compound of formula [Eu (H2O)6(C4O4)(HC4O4).H2O]. The results of this study were compared with those reported in the literature for compounds Y(H2O)6(C4O4)(HC4O4) .H2O and [Y4(H3O)4(C2O4)8.16(H2O)] of the same family.