4.7 Article

Ionic microenvironment constructed in quaternary ammonium modified polyacrylonitrile fiber for efficient CO2 fixation

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Article Chemistry, Physical

Tuning Microenvironment of Quaternary Ammonium Salt and Tertiary Amine Bifunctionalized Polyacrylonitrile Fiber for Cooperatively Catalyzed Aza-Michael Addition

Xueyu Yuan et al.

Summary: A series of novel polyacrylonitrile fiber catalysts modified with different ratios of quaternary ammonium salt (QA) to tertiary amine (TA) were screened for water heterogeneously catalyzed aza-Michael addition. The best catalyst, PAN(PQ-1)F with a QA:TA ratio of 1:1, demonstrated high yield, excellent solvent selectivity, and great recyclability under optimized conditions. The unique microenvironment of PAN(PQ-1)F, featuring a hydrophilic inner layer and hydrophobic surface layer, facilitated product release and high reaction conversion, with a proposed cooperative effect of QA and TA in the catalyst's microenvironment.

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