文献类型：期刊文献

英文题名：Hierarchical Porous Zr-Based MOFs Synthesized by a Facile Monocarboxylic Acid Etching Strategy

作者：Yang, Pengfei[1];Mao, Fangxin[1];Li, Yongsheng[1];Zhuang, Qixin[1];Gu, Jinlou[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2018

卷号：24

期号：12

起止页码：2962

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;EI(收录号：20180604757056);WOS:【SCI-EXPANDED(收录号:WOS:000429415200024)】；

基金：This work was financially supported by the Natural Science Foundation of China (Grants 51072053 and 51372084), the 111 Project (Grant B14018) and the National key research and development program (2016YFC1102100).

语种：英文

外文关键词：concentration; etching temperature; hierarchical pores; monocarboxylic acid etching; UiO-66

摘要：A new monocarboxylic acid etching (MAE) strategy was developed for transforming chemically stable Zr-based metal-organic frameworks (MOFs) of UiO-66 to their hierarchical porous counterpart. The key design element was based on the incomplete replacement of bridging ligands in MOFs by monocarboxylic acids (MAs), leading to the departure of partial ligands and metal clusters to create mesopores in MOFs. A series of MAs with different acidity and carbon chain length were tested, and propionic acid (PA) was screened to be the suitable choice. The textural features including pore size distribution, specific surface area, and pore volume of the obtained products can be controlled by adjusting the MA concentration and reaction temperature. The obtained hierarchical porous MOFs inherited excellent stability from their parent materials. Additionally, the MAE strategy was universal to construct hierarchical porous Zr-based MOFs, and it was expanded to etch UiO-66 derivatives. The excellent adsorption behavior of the resultant hierarchical porous Zr-based MOFs over two enzymes with different size was also successfully exemplified, demonstrating their application potentials with bulky molecules involved.