title: Structural and thermal characterization of cerium, thorium and uranyl complexes of sulfasalazine.
abstract: Cerium(IV), Thorium(IV) and Uranyl(II) complexes with the ammonium salt of sulfasalazine drug (H2SSZ, HL-) have been studied. The structures of the complexes were elucidated using elemental analysis, IR and mass spectroscopy and thermal analysis. The complexes were isolated in 1:1 and 1:2 (M:L) ratios. The solid monocomplexes (1:1) (M:H(2)SSZ) were isolated in the general formulae [UO2(L)(H2O)2].2H2O and [M(L)(X)z(H2O)n].yH2O (M=Ce(IV) and Th(IV) (X=NO3, z=2, n=2, y=0-3)). The biscomplexes (1:2) (M:H2SSZ) solid chelates found to have the general formulae [UO2(HL)2].2H2O and [M(L)2(H2O)2] (M=Ce(IV) and Th(IV)). The thermal decomposition of the complexes should be discussed in relation to structure, and the thermodynamic parameters of the decomposition stages were evaluated applying Coats-Redfern and Horwitz-Mitzger methods.
authors.affiliation: Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt. ggenidy@hotmail.com
authors.forename: Gehad G
authors.initials: GG
authors.lastname: Mohamed
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Soliman
authors.forename: Mohamed A
authors.initials: MA
authors.lastname: El-Mawgood
mesh_terms: D002563:Cerium / Q000737:chemistry*; D004055:Differential Thermal Analysis; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D012460:Sulfasalazine / Q000737:chemistry*; D013816:Thermodynamics; D013818:Thermogravimetry; D013910:Thorium / Q000737:chemistry*; D014501:Uranium / Q000737:chemistry*
chemical_list: D008670:Metals; D002563:Cerium; D012460:Sulfasalazine; D014501:Uranium; D013910:Thorium