Nickel(II) complex catalyzed ring-opening polymerization of lactide
| Autor: | Somanath Mantri, Nibedita Nath, Alekha Kumar Sutar, Anita Routaray, Tungabidya Maharana |
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| Rok vydání: | 2016 |
| Předmět: |
inorganic chemicals
Schiff base Lactide 010405 organic chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Ring-opening polymerization 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Nickel chemistry Polymerization Diamine Polymer chemistry Materials Chemistry Reactivity (chemistry) Physical and Theoretical Chemistry |
| Zdroj: | Polyhedron. 119:335-341 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2016.08.032 |
| Popis: | The present manuscript is focused on the synthesis of a series of nickel complexes [Ni-HMBED, Ni-HMBPD and Ni-HMBBD] based on Salen-type Schiff-base ligands and a study of their reactivity for the ring-opening polymerization (ROP) of lactide. These nickel complexes were prepared by the reactions of a nickel solution with one molar equivalent of the Salen-type Schiff-base ligands in methanol under a nitrogen atmosphere. Characterization of these nickel complexes have been carried out by different analytical techniques, which showed a square planar geometry for the Ni atom. The nickel complexes have shown high activity towards the ring-opening polymerization of lactide, with variation in the diamine group. The linear relationship established between the percentage conversion and the number-average molecular weight has confirmed the controlled ROP by the use of the nickel complexes as a catalyst. Finally, a mechanism for the ROP of lactide has been proposed. |
| Databáze: | OpenAIRE |
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