• PRATAP KUMAR SAHOO

      Articles written in Journal of Chemical Sciences

    • Salicylaldimine Copper(II) complex catalyst: Pioneer for ring opening Polymerization of Lactide

      ANITA ROUTARAY NIBEDITA NATH TUNGABIDYA MAHARANA PRATAP KUMAR SAHOO JAYA PRAKASH DAS ALEKHA KUMAR SUTAR

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      Salicylaldimine copper complex has been synthesized and its reactivity for the ring-opening polymerization(ROP) of lactide has been studied. This monomeric copper complex was prepared by the reaction ofcopper(II) solution with one molar equivalent of salicylaldimine Schiff-base ligand in methanol under nitrogenatmosphere. This copper complex has been characterized by different spectroscopic methods, which showedsquare planar geometry. The molecular structure of the salicylaldimine Schiff-base has been determined byX-ray diffraction studies. The complex was tested as the initiator for the ring-opening polymerization of lactide,with variation in diamine group in ligand. The rate of polymerization is dependent on the diamine groupin the following order: ethylene > propylene > phenyl. The salicylaldimine copper complex allows controlledring-opening polymerization as indicated by the linear relationship between the percentage conversion and thenumber-average molecular weight. On the basis of literature reports, a mechanism for ROP of lactide has beenproposed.

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