سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۴

نویسنده(ها):

Masoud Salavati-Niasari –
Azam sobhani –

چکیده:

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.