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The Effect of Oxygen to Salen-Co Complexes for the Copolymerization of PO/CO2

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Abstract

A series of Salen-Co(II) complexes were synthesized to study the effect of O2 on the catalytic performance of Salen-Co complexes for the copolymerization of PO/CO2. The Salen-Co(II) complexes showed low activity on the cyclo-addition of CO2 to PO with the aid of a cocatalyst such as PPNCl. Unexpectedly, with the addition of O2, the activity of Salen-Co(II) complexes was obviously increased and 100% cyclic carbonate was obtained. As the pressure of O2 increased, the activity of the complex also increased. With the existence of O2, the activity of the complexes was influenced by their structures and the pressure of O2, and the complexes with the conjugated structure showed higher activity. The structures of cocatalyst also played a crucial role as for the change of the activity. By altering the electrophilicity of Salen-Co(III), O2 can also be used as cocatalyst for the copolymerization of PO/CO2.

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Acknowledgments

This work was financially supported by National Key Research and Development Program of China (No. 2016YFC1100701) and the National Natural Science Foundation of China (Nos. 21574124, 51503203, and 51773200).

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Authors and Affiliations

  1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Ran-Long Duan, Yan-Chuan Zhou, Zhi-Qiang Sun, Yue-Zhou Huang, Xuan Pang & Xue-Si Chen

  2. University of Science and Technology of China, Hefei, 230026, China

    Ran-Long Duan, Yue-Zhou Huang, Xuan Pang & Xue-Si Chen

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  1. Ran-Long Duan
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Correspondence to Xuan Pang or Xue-Si Chen.

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Duan, RL., Zhou, YC., Sun, ZQ. et al. The Effect of Oxygen to Salen-Co Complexes for the Copolymerization of PO/CO2. Chin J Polym Sci 38, 1124–1130 (2020). https://doi.org/10.1007/s10118-020-2451-5

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