Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 63, Issue 18, Pages 3240-3255Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2010.510557
Keywords
Nanocomposite materials; Copper(II); Tetraaza; Zeolite encapsulation; Oxidation of ethylbenzene
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Funding
- Council of University of Kashan
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Cu(II) complexes of 14- and 16-membered tetraaza macrocyclic ligands have been encapsulated in nanopores of zeolite-Y by a two-step process in the liquid phase: (1) adsorption of [bis(diamine)copper(II)] (diamine = 1,2-diaminoethane, 1,3-diaminopropane, 1,2-diaminobenzene, and 1,3-diaminobenzene); [Cu(N-N)2]2+-NaY; in the nanopores of the zeolite-Y and (2) in situ condensation of the copper(II) precursor complex with ethylcinnamate. The new host-guest nanocomposite materials were characterized by chemical analysis and spectroscopic methods. The oneato and encapsulated complexes exhibit good catalytic activity in the oxidation of ethylbenzene at 333 K, using tert-butyl hydroperoxide as the oxidant. Acetophenone was the major product though small amounts of o- and p-hydroxyacetophenones were also formed revealing that C-H bond activation takes place both at benzylic and aromatic ring carbon atoms.
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