New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts

R.D. Rittinghaus, P.M. Schäfer, P. Albrecht, C. Conrads, A. Hoffmann, A.N. Ksiazkiewicz, O. Bienemann, A. Pich, S. Herres-Pawlis, ChemSusChem 12 (2019) 2161–2165.

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Abstract
Abstract Polylactide is a biodegradable versatile material based on annually renewable resources and thus CO2-neutral in its lifecycle. Until now, tin(II)octanoate [Sn(Oct2)] was used as catalyst for the industrial ring-opening polymerization of lactide in spite of its cytotoxicity. On the way towards a sustainable catalyst, three iron(II) hybrid guanidine complexes were investigated concerning their molecular structure and applied to the ring-opening polymerization of lactide. The complexes could polymerize unpurified technical-grade rac-lactide as well as recrystallized l-lactide to long-chain polylactide in bulk with monomer/initiator ratios of more than 5000:1 in a controlled manner following the coordination–insertion mechanism. For the first time, a biocompatible complex has surpassed Sn(Oct)2 in its polymerization activity under industrially relevant conditions.
Publishing Year
Journal Title
ChemSusChem
Volume
12
Issue
10
Page
2161-2165
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Rittinghaus RD, Schäfer PM, Albrecht P, et al. New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts. ChemSusChem. 2019;12(10):2161-2165. doi:10.1002/cssc.201900481
Rittinghaus, R. D., Schäfer, P. M., Albrecht, P., Conrads, C., Hoffmann, A., Ksiazkiewicz, A. N., … Herres-Pawlis, S. (2019). New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts. ChemSusChem, 12(10), 2161–2165. https://doi.org/10.1002/cssc.201900481
@article{Rittinghaus_Schäfer_Albrecht_Conrads_Hoffmann_Ksiazkiewicz_Bienemann_Pich_Herres-Pawlis_2019, title={New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts}, volume={12}, DOI={10.1002/cssc.201900481}, number={10}, journal={ChemSusChem}, author={Rittinghaus, Ruth D. and Schäfer, Pascal M. and Albrecht, Pascal and Conrads, Christian and Hoffmann, Alexander and Ksiazkiewicz, Agnieszka N. and Bienemann, Olga and Pich, Andrij and Herres-Pawlis, Sonja}, year={2019}, pages={2161–2165} }
Rittinghaus, Ruth D., Pascal M. Schäfer, Pascal Albrecht, Christian Conrads, Alexander Hoffmann, Agnieszka N. Ksiazkiewicz, Olga Bienemann, Andrij Pich, and Sonja Herres-Pawlis. “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts.” ChemSusChem 12, no. 10 (2019): 2161–65. https://doi.org/10.1002/cssc.201900481.
R. D. Rittinghaus et al., “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts,” ChemSusChem, vol. 12, no. 10, pp. 2161–2165, 2019.
Rittinghaus, Ruth D., et al. “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts.” ChemSusChem, vol. 12, no. 10, 2019, pp. 2161–65, doi:10.1002/cssc.201900481.

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