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Sustainability 2009, 1(4), 1226-1239; doi:10.3390/su1041226
Article

New Challenge for Classics: Neutral Zinc Complexes Stabilised by 2,2’-Bipyridine and 1,10-Phenanthroline and Their Application in the Ring-Opening Polymerisation of Lactide

1
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1
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1
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1
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2
 and
3,*
1 Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany 2 Department of Chemistry, University of Bath, Claverton Down, Bath BA27AY, UK 3 Department Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
* Author to whom correspondence should be addressed.
Received: 30 October 2009 / Accepted: 3 December 2009 / Published: 8 December 2009
(This article belongs to the Special Issue Sustainable Approaches within the Chemical Sciences)
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Abstract

The zinc acetato and triflato complexes of 2,2’-bipyridine and 1,10-phenanthroline were prepared and completely characterised. The whole series (including the already described dichlorido complexes and the ligands themselves) were screened for their catalytic activity in the solvent free ring-opening polymerisation of D,L-lactide. The acetato and triflato complexes were found to be active initiators and polylactides could be obtained in almost quantitative yields or with high molecular weights, up to 145,000 g/mol.
Keywords: biopolymers; zinc; ring-opening polymerisation; lactide; sustainable chemistry; N-donor ligands biopolymers; zinc; ring-opening polymerisation; lactide; sustainable chemistry; N-donor ligands
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Börner, J.; Flörke, U.; Döring, A.; Kuckling, D.; Jones, M.D.; Herres-Pawlis, S. New Challenge for Classics: Neutral Zinc Complexes Stabilised by 2,2’-Bipyridine and 1,10-Phenanthroline and Their Application in the Ring-Opening Polymerisation of Lactide. Sustainability 2009, 1, 1226-1239.

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