催化学报 ›› 2014, Vol. 35 ›› Issue (10): 1701-1708.DOI: 10.1016/S1872-2067(14)60113-3

• 论文 • 上一篇    下一篇

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

Alekha Kumar Sutara, Yasobanta Dasa,b, Sasmita Pattnaika, Anita Routaraya, Nibedita Natha, Prasanta Rathb, Tungabidya Maharanac   

  1. a Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India;
    b School of Applied Sciences (Chemistry), KIIT University, Bhubaneswar, Odisha, India;
    c Department of Chemistry, National Institute of Technology, Raipur, India
  • 收稿日期:2014-03-06 修回日期:2014-04-15 出版日期:2014-09-28 发布日期:2014-09-30
  • 通讯作者: Alekha Kumar Sutar

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

Alekha Kumar Sutara, Yasobanta Dasa,b, Sasmita Pattnaika, Anita Routaraya, Nibedita Natha, Prasanta Rathb, Tungabidya Maharanac   

  1. a Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India;
    b School of Applied Sciences (Chemistry), KIIT University, Bhubaneswar, Odisha, India;
    c Department of Chemistry, National Institute of Technology, Raipur, India
  • Received:2014-03-06 Revised:2014-04-15 Online:2014-09-28 Published:2014-09-30

摘要:

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.

关键词: Polystyrene, Schiff base, Polymer support, Catalysis, Zinc, Phenol oxidation

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