A series of amino acid-paired dipyridine polymers were synthesized and firstly used as metal- and halogen-free heterogeneous organocatalysts for chemical fixation of CO₂ into cyclic carbonates. Glutamic acid (Glu)-paired dipyridine polymer (Pbpy-Glu) possesses the highest catalytic efficiency for cycloaddition reaction under solvent-free conditions, and provides a reasonable recycled process. The mechanism investigation based on the FTIR analysis of catalyst intermediates suggests that the intermolecular synergistic effect involving the -N⁺ ions in pyridine, COO^– groups in Glu, as well as the COO^⋯H₃N ion pairs contributes to the good catalytic performance of Pbpy-Glu.

合成了一系列氨基酸配对的二吡啶聚合物，首先用作无金属和无卤素的多相有机催化剂，用于将CO ₂化学固定为环状碳酸酯。谷氨酸（Glu）配对的二吡啶聚合物（Pbpy-Glu）在无溶剂条件下具有最高的环加成反应催化效率，并提供了合理的循环工艺。基于催化剂中间体的FTIR分析的机构调查表明，涉及-N分子间的协同效应⁺的吡啶离子，COO ^-基团中的Glu，以及所述COO ^⋯ ħ ₃ Ñ离子对有助于良好的催化性能Pbpy-Glu。