• Synthesis and characterization of mononuclear copper(II) complexes of pyridine 2-carboxamide: Their application as catalyst in peroxidative oxidation and antimicrobial agents

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      https://www.ias.ac.in/article/fulltext/jcsc/127/08/1451-1463

    • Keywords

       

      Homogeneous catalysis; Copper; Amide ligand; Oxidation; Antimicrobial activity.

    • Abstract

       

      Four water soluble copper(II) complexes, [Cu(HL)2 (H2O)2]Cl2 (1), [Cu(HL) 2 (ClO4)2 ] (2), [Cu(HL)2 (SCN)2] (3) and [CuL 2 ]·8H 2 O (4), where HL is pyridine 2–carboxamide, have been synthesized and characterized by various spectroscopic techniques. Structures have been determined by single crystal X-ray crystallography. The pH induced inter-conversion of Cu(HL)2 (H2O)2 ]Cl2 (1) and [CuL2]·8H2O (4) through co-ordination mode switching was investigated thoroughly with the help of absorption spectroscopy. Complexes 1–3 were found to be active catalysts for the oxidation of toluene, ethyl benzene and cyclohexane in the presence of hydrogen peroxide as the oxidant under mild conditions. Toluene was oxidized to benzyl alcohol and benzaldehyde, ethyl benzene was oxidized to 1-phenylethanol and acetophenone and cyclohexane was oxidized to yield cyclohexanol and cyclohexanone Antimicrobial activities have been investigated with these copper(II) complexes against gram + ve bacteria, gram − ve bacterial and fungal species.

    • Author Affiliations

       

      Suvendu Samanta1 Shounak Ray1 Sutapa Joardar2 Supriya Dutta3

      1. Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India
      2. Department of Biotechnology, Neotia Institute of Technology, Management and Science, Jhinga, Diamond Harbour Road, Amira, South 24 Parganas 743 368, India
      3. Department of Chemistry, Nistarini College, Deshbandhu Road, Purulia, West Bengal 723 101, India
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