Synthèse, Structure Cristalline Et Réactivité De Nouveaux Matériaux Inorganiques Poreux

Résumé: 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.

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