Continuous-flow synthesis of cyclic carbonates with polymer-supported imidazolium-based ionic liquid (Im-PSIL) catalysts†‡

IF 9.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2024-10-22 DOI:10.1039/d4gc04499a

Zhibo Yu , Haruro Ishitani , Shu Kobayashi

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Abstract

Carbon dioxide (CO₂), a major greenhouse gas emitted through human activities, represents a valuable carbon source for chemical production. However, maximizing its efficient utilization requires novel methods for CO₂ conversion that leverage the advantages of heterogeneous catalysis in continuous-flow systems. Herein, we report polymer-supported ionic liquids (PSILs) as efficient and recyclable catalysts for the continuous-flow synthesis of cyclic carbonates from epoxides and CO₂. We designed imidazolium-based PSIL catalysts specifically for this purpose. These catalysts demonstrated remarkable stability for over 160 h under continuous-flow conditions with gaseous CO₂, achieving an average yield of over 90% throughout the reaction. Furthermore, they exhibit broad applicability to 12 different epoxide substrates, yielding moderate to excellent yields. This work suggests an environmentally friendly pathway for the sustainable and scalable production of cyclic carbonates.

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利用聚合物支撑的咪唑基离子液体 (Im-PSIL) 催化剂连续流合成环状碳酸盐†‡

二氧化碳（CO2）是人类活动排放的一种主要温室气体，是化工生产的宝贵碳源。然而，要最大限度地高效利用二氧化碳，就必须采用新型二氧化碳转化方法，充分利用连续流动系统中异相催化的优势。在此，我们报告了聚合物支撑离子液体（PSILs）作为高效、可回收催化剂从环氧化物和二氧化碳中连续流合成环碳酸盐的情况。我们专门为此设计了咪唑基 PSIL 催化剂。这些催化剂在气态二氧化碳的连续流动条件下表现出了超过 160 小时的出色稳定性，整个反应的平均产率超过 90%。此外，这些催化剂还广泛适用于 12 种不同的环氧化物底物，可获得中等到极好的产率。这项工作为可持续、可扩展地生产环状碳酸盐提供了一种环境友好型途径。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.