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Efficient Polymerization and Selective Depolymerization of Poly(cyclopentene carbonate) Mediated Solely by Heterometallic Rare-Earth(III)/Zinc(II) Complexes
Macromolecules ( IF 5.1 ) Pub Date : 2024-10-30 , DOI: 10.1021/acs.macromol.4c02086
Ziyue Deng, Dan Yuan, Yingming Yao

Poly(cyclopentenyl carbonate) (PCPC) is a recyclable polymer with great potential applications. However, the selective preparation of PCPC from cyclopentene oxide (CPO) and CO2 copolymerization and the chemical recycling of PCPC back to the original monomer CPO are of great challenge. In this work, it was found that the heterometallic rare-earth metal(III)/Zn(II) complexes (RE(III)-Zn(II) complexes) supported by phenylenediamine-bridged triphenols could serve as highly active catalysts for the copolymerization of CPO and CO2 to give pure PCPC. Remarkably, the same complexes alone could also promote the selective depolymerization of PCPC to CPO only by simply raising the reaction temperature up to ca. 160 °C. The copolymerization and depolymerization mechanisms were also proposed.

中文翻译:


仅由杂金属稀土 (III)/锌 (II) 配合物介导的聚(环戊烯碳酸酯)的高效聚合和选择性解聚



聚环戊烯基碳酸酯 (PCPC) 是一种具有巨大潜在应用的可回收聚合物。然而,从环戊烯氧化物 (CPO) 和 CO2 共聚物中选择性制备 PCPC 以及将 PCPC 化学回收回原始单体 CPO 是一项巨大的挑战。在这项工作中,发现由苯二胺桥式三酚负载的异金属稀土金属 (III)/Zn(II) 配合物 (RE(III)-Zn(II) 配合物)可以作为 CPO 和 CO2 共聚的高活性催化剂,得到纯 PCPC。值得注意的是,仅通过简单地将反应温度提高到约 160 °C,相同的复合物也可以单独促进 PCPC 选择性解聚为 CPO。 还提出了共聚和解聚机理。
更新日期:2024-10-30
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