文献类型：期刊文献

英文题名：Controllable construction of imine-linked covalent organic frameworks with regular morphologies by a stepwise feeding-engineered uniform polymerization strategy

作者：Yao, Xing[1];Li, Wen[1];Hao, Ji-Na[1];Li, Yongsheng[1,2]

机构：[1]East China Univ Sci & Technol, Frontier Sci Ctr Mat Biol & Dynam Chem,Key Lab Ult, Shanghai Engn Res Ctr Hierarch Nanomat,Minist Educ, Sch Mat Sci & Engn,Lab Low Dimens Mat Chem, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, State Key Lab Incubat Base Green Proc Chem Engn, Shihezi 832003, Peoples R China

年份：2025

卷号：46

外文期刊名：APPLIED MATERIALS TODAY

收录：;EI(收录号：20253018833281);WOS:【SCI-EXPANDED(收录号:WOS:001541005100001)】；

基金：This work was financially supported by the National Key Research and Development Program of China (2022YFC2403203, 2024YFF0508601) , the National Natural Science Foundation of China (52172279) , Leading Talents in Shanghai in 2018, the Key Field Research Program (2023AB054) , and the Higher Education Discipline Innovation Project (B14018) .

语种：英文

外文关键词：Covalent organic framework; Controllable synthesis; Morphology modulation; Stepwise feeding process; Diverse structures

摘要：The morphology control of covalent organic frameworks (COFs) is critical to regulate their chemical properties for boosting application performance. However, the precise modulation of COFs morphology still remains a great challenge, owing to the poorly controlled polymerization process. Herein, a facile and universal strategy is developed to construct COFs with regular morphology and controllable size by a stepwise feeding-engineered uniform polymerization strategy. The key behind this strategy relies on the manipulation of three factors: good solubility of monomers in solvents, acid pre-activation of aldehyde monomers, and slow drip-addition between the two monomer solutions. This stepwise feeding protocol, compared to the conventional one-step feeding process, significantly enhances the uniformity of fast polymerization reaction, enabling instantaneous consumption of the introduced monomers to rapidly form highly regular covalent organic polymers (COPs) at room temperature, which subsequently transform into uniform COFs. Remarkably, this strategy is demonstrated to be versatile across eight distinct amine/aldehyde monomer pairs, producing diverse uniform COPs and COFs with well-defined spherical, hollow, core-shell micro-/nano-structures. This work highlights the important role of feeding protocol in controlling reaction homogeneity and the morphological regularity of COFs, providing an effective yet previously overlooked strategy for rational synthesis of well-defined COFs.