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Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization.
Chemistry. 2017 Nov 21; 23(65):16472-16475.C

Abstract

In the pursuit of CO2 -based materials, the development of efficient catalysts for the alternating copolymerization of CO2 and epoxides to give polycarbonates is receiving particular attention. Desirable attributes for such catalysts are high copolymerization activity at low CO2 pressure, as well as chemo- and stereocontrol over the formed polymer. Here, we report a novel chiral zinc catalyst that can be isolated in 97 % yield from commercial sources, and that produces polycarbonates selectively from neat cyclohexene oxide under 1 bar of CO2 pressure at temperatures above 50 °C. At 80 °C reaction temperature, TONs of 1684 and initial TOFs up to 149 h-1 were measured, producing an isotactic-enriched polycarbonate with a probability Pm of 65 % for the formation of a meso diad. Insight into the dinuclear nature of the active species and the copolymerization progress has been gained from structural and spectroscopic studies.

Authors+Show Affiliations

Universität Göttingen, Institut für Anorganische Chemie, Tammannstr. 4, 37075, Göttingen, Germany.Universität Göttingen, Institut für Anorganische Chemie, Tammannstr. 4, 37075, Göttingen, Germany.Universität Göttingen, Institut für Anorganische Chemie, Tammannstr. 4, 37075, Göttingen, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29024105

Citation

Schütze, Mike, et al. "Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization." Chemistry (Weinheim an Der Bergstrasse, Germany), vol. 23, no. 65, 2017, pp. 16472-16475.
Schütze M, Dechert S, Meyer F. Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization. Chemistry. 2017;23(65):16472-16475.
Schütze, M., Dechert, S., & Meyer, F. (2017). Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization. Chemistry (Weinheim an Der Bergstrasse, Germany), 23(65), 16472-16475. https://doi.org/10.1002/chem.201704754
Schütze M, Dechert S, Meyer F. Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization. Chemistry. 2017 Nov 21;23(65):16472-16475. PubMed PMID: 29024105.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Highly Active and Readily Accessible Proline-Based Dizinc Catalyst for CO2 /Epoxide Copolymerization. AU - Schütze,Mike, AU - Dechert,Sebastian, AU - Meyer,Franc, Y1 - 2017/10/27/ PY - 2017/10/09/received PY - 2017/10/13/pubmed PY - 2017/10/13/medline PY - 2017/10/13/entrez KW - CO2 activation KW - copolymerization KW - cyclohexene oxide KW - epoxide KW - green chemistry KW - low pressure polymerization SP - 16472 EP - 16475 JF - Chemistry (Weinheim an der Bergstrasse, Germany) JO - Chemistry VL - 23 IS - 65 N2 - In the pursuit of CO2 -based materials, the development of efficient catalysts for the alternating copolymerization of CO2 and epoxides to give polycarbonates is receiving particular attention. Desirable attributes for such catalysts are high copolymerization activity at low CO2 pressure, as well as chemo- and stereocontrol over the formed polymer. Here, we report a novel chiral zinc catalyst that can be isolated in 97 % yield from commercial sources, and that produces polycarbonates selectively from neat cyclohexene oxide under 1 bar of CO2 pressure at temperatures above 50 °C. At 80 °C reaction temperature, TONs of 1684 and initial TOFs up to 149 h-1 were measured, producing an isotactic-enriched polycarbonate with a probability Pm of 65 % for the formation of a meso diad. Insight into the dinuclear nature of the active species and the copolymerization progress has been gained from structural and spectroscopic studies. SN - 1521-3765 UR - https://www.unboundmedicine.com/medline/citation/29024105/Highly_Active_and_Readily_Accessible_Proline_Based_Dizinc_Catalyst_for_CO2_/Epoxide_Copolymerization_ L2 - https://doi.org/10.1002/chem.201704754 DB - PRIME DP - Unbound Medicine ER -
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