Citation: Anita Routaray, Nibedita Nath, Somanath Mantri, Tungabidya Maharana, Alekha Kumar Sutar. Synthesis and structural studies of copper(II) complex supported by -ONNO- tetradentate ligand: Efficient catalyst for the ring-opening polymerization of lactide[J]. Chinese Journal of Catalysis, ;2015, 36(5): 764-770. doi: 10.1016/S1872-2067(14)60293-X shu

Synthesis and structural studies of copper(II) complex supported by -ONNO- tetradentate ligand: Efficient catalyst for the ring-opening polymerization of lactide

1.
a Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack-3, Odisha, India;

Corresponding author: Tungabidya Maharana, Alekha Kumar Sutar,
Received Date: 12 December 2014
Available Online: 12 January 2015

The -ONNO- tetradentate Schiff base ligand N,N'-bis(2-hydroxy-3-methoxybenzaldehyde)benzene-1,2-diamine (HMBBD) has been synthesized. The ligand was attached to copper (Cu-HMBBD) in methanol under N₂ atmosphere to give a mononuclear complex. The reactivity of this complex in the ring-opening polymerization (ROP) of lactide has been studied. The complex has a square planner geometry, as determined by X-ray diffraction studies. The copper complex is highly active towards the ring-opening polymerization of lactide, and the rate of polymerization is heavily dependent on the initiator used. The copper complex allows controlled ring-opening polymerization, as shown by the linear relationship between the percentage conversion and the number average molecular weight. Based on the literature, a mechanism for the ROP of lactide has been proposed.
- Ring-opening polymerization,
- Lactide,
- Copper complex,
- Polylactic acid
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