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۱Synthesis, characterization and catalytic oxidation of cyclohexane by Host (zeolite–Y)–Guest (transition metal complexes of bis(salicyaldehyde)oxaloyldihydrazone)
نویسنده(ها): ،
اطلاعات انتشار: همایش بین المللی ژئولیت ایران، سال
تعداد صفحات: ۴
The monomer transition metal complexes; [ML] (M = Mn(II), Co(II), Ni(II) and Cu(II)) have been
synthesized from the reaction of metal acetate with bis(salicyaldehyde)oxaloyldihydrazone, H2L; in
1:1 molar ratio in ethanol under reflux. The complexes (Co(II), Ni(II) and Cu(II)) are suggested to
have four–coordinate square–planar stereochemistry while the Mn(II) complexe is suggested to have
tetrahedral stereochemistry. These metal complexes with tetradendate Schiff–base ligand was
entrapped in the nanocavity of zeolite–Y by a two–step process in the liquid phase: (i) adsorption of
[bis(salicylaldiminato)metal(II)]; [M(sal)2]–NaY; in the supercages of the zeolite, and (ii) in situ Schiff
condensation of the metal(II) precursor complex with oxaloyldihydrazone; [ML]–NaY. The new Host–
Guest Nanocomposite Materials (HGNM) was characterized by several techniques: chemical analysis,
spectroscopic methods (DRS, NMR, BET, FTIR and UV\Vis), conductometric and magnetic
measurements. The catalytic activities for oxidation of cyclohexane with HGNM and neat were
reported.<\div>
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