Behnam Habibi, Paria Soleimani Abhari, Mohsen Eisari, Ali Morsali, Xiao-Wei Yan
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The MOF-801(PZDC-NO<sub>2</sub>) has been fully characterized via various analyses, such as Fourier transform infrared, powder X-ray diffraction, <sup>13</sup>C/<sup>1</sup>H nuclear magnetic resonance, XPS, TGA, and N<sub>2</sub> adsorption/desorption, SEM, EDX, etc. By considering the concurrent existence of acid–base active sites and the synergistic role of these sites, this mixed-linker MOF was used as a catalyst for the cycloaddition reaction of CO<sub>2</sub> and epoxides under mild without-solvent conditions. MOF-801(PZDC-NO<sub>2</sub>) displays significant catalytic performance by producing the highest catalytic conversion of epoxide to cyclic carbonate (93%) with a turnover number of 130.7 in 8 h reaction time and 100 °C temperature under low-pressure CO<sub>2</sub> pressure. The mixed-linker Zr-MOF exhibits exceptional stability and reusability, maintaining its structure and functionality after consecutive cycles of utilization. Finally, the reaction mechanism was further investigated by density functional theory calculations. The total energy of the reactants, intermediates, and products involved in the process.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mixed-Linker Zr-Metal–Organic Framework with Improved Lewis Acidic Sites for CO2 Fixation Reaction Catalysis\",\"authors\":\"Behnam Habibi, Paria Soleimani Abhari, Mohsen Eisari, Ali Morsali, Xiao-Wei Yan\",\"doi\":\"10.1021/acs.inorgchem.4c03887\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Applying the mixed-linker strategy in synthesizing metal–organic frameworks (MOFs) has drawn considerable attention as a heterogeneous catalyst owing to their easy synthesis and different functional ligands in their frameworks. 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引用次数: 0
摘要
由于金属有机框架(MOFs)易于合成且框架中含有不同的功能配体,因此在合成金属有机框架(MOFs)时采用混合连接体策略作为一种异相催化剂引起了广泛关注。根据这一策略,我们开发了一种混合连接体 Zr(IV)-based MOF,[Zr6O4(OH)4(FUM)n(PZDC-NO2)6-n](PZDC-NO2 = 4-硝基-3,5-吡唑二羧酸,FUM = 富马酸),命名为 MOF-801(PZDC-NO2)。MOF-801(PZDC-NO2)通过傅立叶变换红外光谱、粉末 X 射线衍射、13C/1H 核磁共振、XPS、TGA、N2 吸附/解吸、SEM、EDX 等多种分析方法进行了全面表征。考虑到酸碱活性位点的同时存在以及这些位点的协同作用,该混合连接剂 MOF 被用作催化剂,在温和的无溶剂条件下用于 CO2 与环氧化物的环加成反应。MOF-801(PZDC-NO2) 具有显著的催化性能,在低压 CO2 压力和 100 °C 温度下,反应时间为 8 小时,环氧化物到环碳酸盐的催化转化率最高(93%),转化率为 130.7。混合连接剂 Zr-MOF 具有优异的稳定性和可重复使用性,在连续循环使用后仍能保持其结构和功能。最后,通过密度泛函理论计算进一步研究了反应机理。该过程中涉及的反应物、中间产物和生成物的总能量。
Mixed-Linker Zr-Metal–Organic Framework with Improved Lewis Acidic Sites for CO2 Fixation Reaction Catalysis
Applying the mixed-linker strategy in synthesizing metal–organic frameworks (MOFs) has drawn considerable attention as a heterogeneous catalyst owing to their easy synthesis and different functional ligands in their frameworks. Following this strategy, we have developed a mixed linker Zr(IV)-based MOF, [Zr6O4(OH)4(FUM)n(PZDC-NO2)6-n] (PZDC-NO2 = 4-nitro-3,5-pyrazoledicarboxylic acid, FUM = fumaric acid) denoted as MOF-801(PZDC-NO2) synthesized via this strategy which possess an electron-withdrawing group (–NO2) on secondary linkers. The MOF-801(PZDC-NO2) has been fully characterized via various analyses, such as Fourier transform infrared, powder X-ray diffraction, 13C/1H nuclear magnetic resonance, XPS, TGA, and N2 adsorption/desorption, SEM, EDX, etc. By considering the concurrent existence of acid–base active sites and the synergistic role of these sites, this mixed-linker MOF was used as a catalyst for the cycloaddition reaction of CO2 and epoxides under mild without-solvent conditions. MOF-801(PZDC-NO2) displays significant catalytic performance by producing the highest catalytic conversion of epoxide to cyclic carbonate (93%) with a turnover number of 130.7 in 8 h reaction time and 100 °C temperature under low-pressure CO2 pressure. The mixed-linker Zr-MOF exhibits exceptional stability and reusability, maintaining its structure and functionality after consecutive cycles of utilization. Finally, the reaction mechanism was further investigated by density functional theory calculations. The total energy of the reactants, intermediates, and products involved in the process.
期刊介绍:
Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.