自适应金属有机框架组合二铁活性位点模仿单氧酶
Zitong Wang1, Pierce Yeary1, Xuanyu Feng1
1Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States.
Journal of the American Chemical Society
|April 6, 2023
概括
研究人员在MOF-253中制造了人工二铁催化剂,以模仿天然的单氧化酶. 这种基于MOF的催化剂有效地进行氧化反应,由于合作铁中心,其活性得到增强.
科学领域:
- 材料科学
- 催化剂
- 生物模拟化学
背景情况:
- 设计复制自然酶结构和功能的人造酶是一项挑战.
- 二铁单氧酶是参与各种氧化转换的关键酶.
研究的目的:
- 在MOF-253中以后合成构建双核铁催化剂以模仿二铁单氧酶.
- 评估基于MOF的人造单氧酶的催化活性和机制.
主要方法:
- 合成后的MOF-253改造以结合双核铁中心.
- 使用ICP-MS,TGA,XAS和FTIR进行表征.
- 使用O2进行氧化转化 (C-H氧化,环氧化) 的催化评估.
- 用密度函数理论 (DFT) 计算来研究反应机制.
主要成果:
- 在MOF-253中成功形成双核铁活性位点,[bpy) FeIII[μ2-OH]2.
- 基于MOF的催化剂有效催化了C-H氧化和氧化.
- 比单核对照显示了27倍的活性.
- DFT的计算显示,由于合作的铁中心,双核系统中C-H激活的能量障碍较低.
结论:
- MOF-253系统成功地复制了天然二铁单氧酶的结构和功能.
- 双核铁中心的合作性对于速度决定阶段的有效催化是至关重要的.
- 开发的基于MOF的人工单氧酶显示稳定性和可回收性.
相关概念视频
Metal-Ligand Bonds
21.2K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.2K
Properties of Organometallic Compounds
1.1K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.1K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.5K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.5K


