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Issue 6, 2015
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Ring-opening polymerization of lactide using chiral salen aluminum complexes as initiators: high productivity and stereoselectivity

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Abstract

A family of aluminum complexes bearing chiral salen ligands derived from (R,R)-1,2-diammoniumcyclohexane mono-(+)-tartrate salt and modified by salicylaldehyde were prepared. The complexes were characterized by 1H, 13C NMR and elemental analysis. These complexes were used as initiators for the ring-opening polymerization (ROP) of L-lactide and rac-lactide. Complex 2 (R1 = R2 = Cl) showed the highest activity among these complexes for the ROP of L-lactide, and complex 3 (R1 = tBu, R2 = Cl) showed the highest stereoselectivity for the ROP of rac-lactide with enriched isotactic polylactide with a Pm of 0.91. The kinetic data of the polymerization employing complex 3 as initiator indicated that the polymeric rate was first-order in both lactide and in initiator.

Graphical abstract: Ring-opening polymerization of lactide using chiral salen aluminum complexes as initiators: high productivity and stereoselectivity

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Publication details

The article was received on 24 Feb 2015, accepted on 31 Mar 2015 and first published on 02 Apr 2015


Article type: Paper
DOI: 10.1039/C5NJ00469A
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Citation: New J. Chem., 2015,39, 4670-4675
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    Ring-opening polymerization of lactide using chiral salen aluminum complexes as initiators: high productivity and stereoselectivity

    B. Gao, D. Li, Y. Li, Q. Duan, R. Duan and X. Pang, New J. Chem., 2015, 39, 4670
    DOI: 10.1039/C5NJ00469A

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