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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
,
1
,
1
,
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 (CC BY 3.0).
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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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