Synthesis and characterization of a new nanomagnetic coordination composite from Fe3O4 and Cu(II) complex: as an efficient catalyst in oxidation of benzyl alcohol

New nanomagnetic coordination compound, Cu(salal)@DA@ Fe 3 O 4 , was synthesized by bonding between the Cu(II) complex and Fe 3 O 4 nanoparticles. The Cu complex has two aldehyde groups. The surface of Fe 3 O 4 nanoparticles was modified by the dopamine molecules and the amine group of dopamine is f...

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Bibliographic Details
Published in:Research on chemical intermediates 2018-11, Vol.44 (11), p.6605-6619
Main Authors: Mardani, Hamid Reza, Ziari, Mitra
Format: Article
Language:English
Subjects:
Alcohol
Benzyl alcohol
Catalysis
Chemistry
Chemistry and Materials Science
Coordination compounds
Copper
Crystallites
Dopamine
Hydrogen peroxide
Imines
Inorganic Chemistry
Iron oxides
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Oxidation
Physical Chemistry
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Summary:New nanomagnetic coordination compound, Cu(salal)@DA@ Fe 3 O 4 , was synthesized by bonding between the Cu(II) complex and Fe 3 O 4 nanoparticles. The Cu complex has two aldehyde groups. The surface of Fe 3 O 4 nanoparticles was modified by the dopamine molecules and the amine group of dopamine is free. Therefore, the Cu complex is covalently anchored to Fe 3 O 4 nanoparticle by the formation of imine bonds between the aldehyde and amine groups. On the other hand, a Cu-Schiff base complex is immobilized on nano-Fe 3 O 4 by dopamine as a bridge. Consequently, the homogeneous Cu complex is easily converted to the heterogeneous-magnetic compound in this project. The Cu complex, Fe 3 O 4 and new nanocomposite were characterized by general techniques such as FTIR, TGA, XRD, FESEM, MAP and EDS. The average crystallite size of Fe 3 O 4 and Cu(salal)@DA@ Fe 3 O 4 were calculated by Scherrer’s formula and they are 18.52 and 24.69 nm, respectively. These results indicated the average crystallite size of Fe 3 O 4 nanomaterials is slightly increased by surface modification by Cu complex. The FESEM images show a tiny spherical mushroom morphology for both nanocompounds, and the EDS analysis confirms the presence of Fe, Cu, C and O in the nanomagnetic coordination composite. The catalytic properties of these compounds were studied and compared to oxidation of benzyl alcohol by 30% H 2 O 2 at room temperature. The results show that the catalytic properties Cu complex and Fe 3 O 4 were enhanced by cooperation of both compounds in a nanocoordination composite.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-018-3511-0