吸附
硼酸
共价有机骨架
化学
共价键
化学吸附
解吸
选择性
二醇
热稳定性
选择性吸附
吸热过程
化学工程
卟啉
有机化学
催化作用
工程类
作者
Ziyi Wang,Xu Li,Ting Zou,Furong Tang,Juan Zhang
标识
DOI:10.1016/j.apsusc.2023.158698
摘要
In this work, we report a post-synthetic modification strategy to synthesize a boronic acid-functionalized porphyrin-based covalent organic framework (denoted as BA-COF) via the Suzuki-Miyaura cross-coupling reaction. Interestingly, BA-COF exhibits excellent selectivity in adsorbing cis-diol-containing compounds (CDC). The selective adsorption mechanism was addressed in detail, which is probably due to the boronate affinity from boronic acid group, hydrophilic interaction from the nitrogen-rich framework as well as “host–guest” interaction from the unique “trap” structure of porphyrin-based COF. The characterized results demonstrated its uniform morphology, large specific surface area, and excellent thermal stability. The adsorption kinetics demonstrated that the adenosine adsorption onto BA-COF conformed to the pseudo-second-order kinetic model and belonged to chemisorption. Based on the fitting of adsorption isotherms and thermodynamic analysis, the adenosine adsorption onto BA-COF was monomolecular layer adsorption and was a spontaneous endothermic reaction. Moreover, the reuse performance of BA-COF was investigated through consecutive adsorption–desorption cycle experiments. This work also demonstrates the potential of BA-COF for effective and selective adsorption of CDC in real sample.
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