Synthesis and Structural Studies of Nickel Complex Supported by-ONNO-Tetra Dentate Schiff-Base Ligand: Efficient Catalysts for Oxidation of Phenol
International Journal of Materials Science and Applications
Volume 2, Issue 4, July 2013, Pages: 136-145
Received: Jul. 2, 2013;
Published: Aug. 10, 2013
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Alekha Kumar Sutar, Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India
Yasobanta Das, School of Applied Sciences (Chemistry), KIIT University, Bhubaneswar, Odisha, India
Sasmita Pattnaik, Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India
Nibedita Nath, Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India
Prasanta Rath, School of Applied Sciences (Chemistry), KIIT University, Bhubaneswar, Odisha, India
Tungabidya Maharana, Department of Chemistry, National Institute of Technology, Raipur, India
The free and polymer anchored complex of nickel [3-MHBdMBn-Ni and P-3-MHBdMBn-Ni], supported by -ONNO-tetradentate Schiff-base ligand are prepared by the reactions of nickel solution with one molar equivalent of unsupported 3-MHBdMBn (N, N'-bis (2-hydroxy-3-methylbenzaldehyde) 4-Methylbenzene-1,2-diamine) or polymer supported (P-3-MHBdMBn) Schiff-base ligands in methanol. The structural study reveal that nickel (II) complex of 3-MHBdMBn Schiff base is square planar in geometry. Complexation of nickel ion increased the thermal stability of 3-MHBdMBn Schiff base. The catalytic activity of nickel complex towards the oxidation of phenol is investigated in the presence of hydrogen peroxide. Experimental results indicate that the reactivity of P-3-MHBdMBn-Ni is dramatically affected by the polymer support over 3-MHBdMBn-Ni and the rate of oxidation (Rp) for unsupported one is 1.28 x 10-6 mole dm-3 s-1 and for supported analogue is 1.99 x 10-6 mole dm-3 s-1.
Alekha Kumar Sutar,
Synthesis and Structural Studies of Nickel Complex Supported by-ONNO-Tetra Dentate Schiff-Base Ligand: Efficient Catalysts for Oxidation of Phenol, International Journal of Materials Science and Applications.
Vol. 2, No. 4,
2013, pp. 136-145.
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