文献类型：期刊文献

英文题名：Ligand Defect Density Regulation in Metal-Organic Frameworks by Functional Group Engineering on Linkers

作者：Yang, Qihao[1,2];Wang, Yinming[1,2];Tang, Xuan[3,4];Zhang, Qiuju[1,2];Dai, Sheng[3,4];Peng, Huaitao[1];Lin, Yichao[1,2];Tian, Ziqi[1,2];Lu, Zhiyi[1,2];Chen, Liang[1,2]

机构：[1]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Key Lab Adv Mat,Inst Fine Che, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Inst Fine Chem,Joint Int Res, Shanghai 200237, Peoples R China

年份：2022

卷号：22

期号：2

起止页码：838

外文期刊名：NANO LETTERS

收录：;EI(收录号：20220411537718);WOS:【SCI-EXPANDED(收录号:WOS:000770007400038)】；

基金：This work is supported by the National Key Research and Development Program of China (2018YFB0704300), National Natural Science Foundation of China (51872306 and 22101288), the "From 0 to 1" Innovative Program of Chinese Academy of Science (ZDBS-LY-JSC021), the Hundred Talents Programs in Chinese Academy of Science, Bellwethers Project of Zhejiang Research and Development Plan, Ningbo Yongjiang Talent Introduction Programme, the Ningbo S&T Innovation 2025 Major Special Program (2020Z059 and 2020Z107), the Science and Technology Innovation 2025 Program in Ningbo (2019B10046), Ningbo Natural Science Foundation (2021J202), K. C. Wong Education Foundation (GJTD-2019-13), the National Postdoctoral Program for Innovative Talents (BX20190340), the China Postdoctoral Science Foundation (2019M660146), the Fundamental Research Funds for the Central Universities (JKVJ1211022), Shanghai Municipal Science and Technology Major Project (grant 2018SHZDZX03), Shanghai Rising-star Program (20QA1402400), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning. Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center at East China University of Science and Technology.

语种：英文

外文关键词：metal-organic frameworks; defects engineering; functional groups; STEM characterization

摘要：Defects in solid materials vitally determine their physicochemical properties; however, facile regulation of the defect density is still a challenge. Herein, we demonstrate that the ligand defect density of metal-organic frameworks (MOFs) with a UiO-66 structural prototype is precisely regulated by tuning the linker groups (X = OMe, Me, H, F). Detailed analyses reveal that the ligand defect concentration is positively correlated with the electronegativity of linker groups, and Ce-UiO-66-F, constructed by F-containing ligands and Ce-oxo nodes, possesses the superior ligand defect density (>25%) and identifiable irregular periodicity. The increase in ligand defect density results in the reduction of the valence state and the coordination number of Ce sites in Ce-UiO-66-X, and this merit further validates the relationship between the defective structure and catalytic performance of CO2 cycloaddition reaction. This facile, efficient, and reliable strategy may also be applicable to precisely constructing the defect density of porous materials in the future.