Novel polystyrene-anchored zinc complex：Efficient catalyst for phenol oxidation

doi:10.1016/S1872-2067(14)60113-3

Abstract

Abstract:

The novel recyclable free -ONNO- tetradentate Schiff base ligand N,N′-bis(2-hydroxy-3- methoxybenzaldehyde)4-methylbenzene-1,2-diamine (3-MOBdMBn) was synthesized. Complexation of this ligand with zinc (3-MOBdMBn-Zn) was performed, and the catalytic activity of the complex was evaluated. The polymer-supported analog of this complex (P-3-MOBdMBn-Zn) was synthesized, and its catalytic activity was studied. These free and polymer-anchored zinc complexes were prepared by the reactions of metal solutions with one molar equivalent of unsupported 3-MOBdMBn or P-3-MOBdMBn in methanol under nitrogen. The catalytic activity of 3-MOBdMBn-Zn and P-3-MOBdMBn-Zn was evaluated in phenol oxidation. The activity of P-3-MOBdMBn-Zn was significantly affected by the polymer support, and the rate of phenol conversion was around 50% for polystyrene-supported 3-MOBdMBn. The experimental results indicated that the reaction rate was affected by the polymer support, and the rate of phenol conversion was 1.64 μmol/(L·s) in the presence of polystyrene-supported 3-MOBdMBn.

Key words: Polystyrene, Schiff base, Polymer support, Catalysis, Zinc, Phenol oxidation

Alekha Kumar Sutar, Yasobanta Das, Sasmita Pattnaik, Anita Routaray, Nibedita Nath, Prasanta Rath, Tungabidya Maharana. Novel polystyrene-anchored zinc complex：Efficient catalyst for phenol oxidation[J]. Chinese Journal of Catalysis, 2014, 35(10): 1701-1708.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(14)60113-3

https://www.cjcatal.com/EN/Y2014/V35/I10/1701

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