烯类反应
点击化学
共价键
材料科学
硫醇
共价有机骨架
表面改性
离子
组合化学
高分子化学
光化学
有机化学
化学
物理化学
作者
Mingyan Li,Liangjun Chen,Du Juan,Chengtao Gong,Tingting Li,Jian Wang,Feili Li,Yuanbin She,Jianhong Jia
标识
DOI:10.1021/acsami.3c16227
摘要
As a common water pollutant, Pb2+ has harmful effects on the nervous, hematopoietic, digestive, renal, cardiovascular, and endocrine systems. Due to the drawbacks of traditional adsorbents such as structural disorder, poor stability, and difficulty in introducing adsorption active sites, the adsorption capacity is low, and it is difficult to accurately study the adsorption mechanism. Herein, vinyl-functionalized covalent organic frameworks (COFs) were synthesized at room temperature, and sulfur-containing active groups were introduced by the click reaction. By precisely tuning the chemical structure of the sulfur-containing reactive groups through the click reaction, we found that the adsorption activity of the sulfhydryl group was higher than that of the sulfur atom in the thioether. Moreover, the incorporation of flexible linking groups was observed to enhance the adsorption activity at the active site. The maximum adsorption capacity of the postmodified COF TAVA-S-Et-SH for Pb(II) reached 303.0 mg/g, which is 2.9 times higher than that of the unmodified COF. This work not only demonstrates the remarkable potential of the “thiol–ene” click reaction for the customization of active adsorption sites but also demonstrates the remarkable potential of the “thiol–alkene” click reaction to explore the structure–effect relationship between the active adsorption sites and the metal ion adsorption capacity.
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