Monomeric and dimeric Al(III) complexes for the production of polylactide
| Autor: | Gabriele Kociok-Köhn, Lynne H. Thomas, Helena C. Quilter, Matthew D. Jones, Sarah M. Kirk, Antoine Buchard |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Stereochemistry
Polyesters chemistry.chemical_element Stereoisomerism Naphthalenes Crystallography X-Ray Ligands 010402 general chemistry 01 natural sciences Polymerization Inorganic Chemistry Structure-Activity Relationship chemistry.chemical_compound Coordination Complexes Aluminium Polymer chemistry Molecule Bimetallic strip Schiff Bases Schiff base Molecular Structure 010405 organic chemistry 0104 chemical sciences Polyester Monomer chemistry Aluminum |
| Zdroj: | Kirk, S M, Quilter, H C, Buchard, A, Thomas, L H, Kociok-Kohn, G & Jones, M D 2016, ' Monomeric and dimeric Al(III) complexes for the production of polylactide ', Dalton Transactions, vol. 45, no. 35, pp. 13846-13852 . https://doi.org/10.1039/C6DT02861F |
| DOI: | 10.1039/C6DT02861F |
| Popis: | A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolated, however, with 1,5 and 1,8- diaminonaphthalene based ligands bimetallic complexes were formed. In all cases 4-coordinate tetrahedral Al(III) centres were observed in the solid state and in solution. There was little difference in rate of polymerisation of rac-lactide between the monometallic and bimetallic complexes based on 1,5-diaminonaphthalene. However, for the 1,8-diaminonaphthalene the complex was an order of magnitude faster than the monometallic and the analogous 1,5-system. Moreover, this complex was active at room temperature, which is rare for aluminium initiators, and PLA with a high degree (Pm = 0.82) of isotacticity was observed. |
| Databáze: | OpenAIRE |
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