A pyridinium‐based ionic‐liquid‐decorated 1 D metal–organic framework (MOF; IL–[In₂(dpa)₃(1,10‐phen)₂]; IL=ionic liquid; dpa=diphenic acid; 1,10‐phen=1,10‐phenanthroline) was developed as a bifunctional heterogeneous catalyst system for CO₂–oxirane coupling reactions. An aqueous–microwave route was employed to perform the hydrothermal reaction for the synthesis of the [In₂(dpa)₃(1,10‐phen)₂] MOF, and the IL–[In₂(dpa)₃(1,10‐phen)₂] catalyst was synthesized by covalent postfunctionalization. As a result of the synergetic effect of the dual‐functional sites, which include Lewis acid sites (coordinatively unsaturated In sites) and the I⁻ ion in the IL functional sites, IL–[In₂(dpa)₃(1,10‐phen)₂] displayed a high catalytic activity for CO₂–epoxide cycloaddition reactions under mild and solvent‐free conditions. Microwave pulses were employed for the first time in MOF‐catalyzed CO₂–epoxide cycloaddition reactions to result in a high turnover frequency of 2000–3100 h⁻¹. The catalyst had an excellent reusability and maintained a continuous high selectivity. Furthermore, only a small amount of leaching was observed from the spent catalyst. A plausible reaction mechanism based on the synergistic effect of the dual‐functional sites that catalyze the CO₂–epoxide cycloaddition reaction effectively is proposed.

中文翻译：

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双功能基于吡啶鎓的离子液体固定化的二铟三（二苯甲酸）双（1,10-菲咯啉）用于固定CO2

吡啶基离子液体修饰的一维金属有机框架（MOF; IL– [In ₂（dpa）₃（1,10-phen）₂ ]; IL =离子液体; dpa =二苯甲酸; 1,10 ‐phen = 1,10- phenothroline ）被开发为用于CO _2-环氧乙烷偶联反应的双功能多相催化剂体系。采用水-微波路线进行水热反应以合成[In ₂（dpa）₃（1,10-phen）₂ ] MOF和IL- [In ₂（dpa）₃（1,10） ‐phen）₂通过共价后官能化合成]催化剂。作为双官能的位点，其包括路易斯酸位点（配位不饱和在位点）和I的协同效应的结果^-在IL功能位点的离子，IL-[在₂（DPA）₃（1,10- phen）₂ ]在温和无溶剂条件下对CO _2-环氧环加成反应显示出高催化活性。在MOF催化的CO _2-环氧环加成反应中首次使用微波脉冲，以产生2000–3100 h ^-1的高周转频率。该催化剂具有优异的可重复使用性并保持连续的高选择性。此外，从废催化剂中仅观察到少量浸出。提出了基于双功能位点协同效应有效催化CO _2-环氧环加成反应的合理反应机理。