title: New palladium-oxazoline complexes: Synthesis and evaluation of the optical properties and the catalytic power during the oxidation of textile dyes.
abstract: The present paper describes the synthesis of new palladium-oxazoline complexes in one step with good to high yields (68-95%). The oxazolines were prepared from enantiomerically pure α-aminoalcohols. The structures of the synthesized palladium complexes were confirmed by NMR, FTIR, TOFMS, UV-visible spectroscopic analysis and X-ray diffraction. The optical properties of the complexes were evaluated by the determination of the gap energy values (E g) ranging between 2.34 and 3.21 eV. Their catalytic activities were tested for the degradation of Eriochrome Blue Black B (a model of azo dyes) in the presence of an ecological oxidant (H2O2). The efficiency of the decolorization has been confirmed via UV-visible spectroscopic analysis and the factors affecting the degradation phenomenon have been studied. The removal of the Eriochrome reached high yields. We have found that the complex 9 promoted 84% of color elimination within 5 min (C 0 = 30 mg/L, T = 22 °C, pH 7, H2O2 = 0.5 mL) and the energetic parameters have been also determined.
authors.affiliation: Laboratoire de Synthèse Organique, Asymétrique et Catalyse Homogène (11URES56), Faculté des sciences de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisia, Tel: 0021673500279.
authors.forename: Rym
authors.initials: R
authors.lastname: Hassani
authors.affiliation: Laboratoire de Synthèse Organique, Asymétrique et Catalyse Homogène (11URES56), Faculté des sciences de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisia, Tel: 0021673500279.
authors.forename: Mahjoub
authors.initials: M
authors.lastname: Jabli
authors.affiliation: Laboratoire de Synthèse Organique, Asymétrique et Catalyse Homogène (11URES56), Faculté des sciences de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisia, Tel: 0021673500279.
authors.forename: Yakdhane
authors.initials: Y
authors.lastname: Kacem
authors.affiliation: University of Versailles Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles, UMR CNRS 8180, 45, avenue des Etats-Unis, 78035 Versailles, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Marrot
authors.affiliation: University of Versailles Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles, UMR CNRS 8180, 45, avenue des Etats-Unis, 78035 Versailles, France.
authors.forename: Damien
authors.initials: D
authors.lastname: Prim
authors.affiliation: Laboratoire de Synthèse Organique, Asymétrique et Catalyse Homogène (11URES56), Faculté des sciences de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisia, Tel: 0021673500279.
authors.forename: Béchir
authors.initials: B
authors.lastname: Ben Hassine
keywords: aminoalcohols; catalysis; dye decolorization; optical properties; oxazolines; palladium complexes