Single-Site Cobalt Catalysts at New Zr<sub>8</sub>(μ<sub>2</sub>-O)<sub>8</sub>(μ<sub>2</sub>-OH)<sub>4</sub> Metal-Organic Framework Nodes for Highly Active Hydrogenation of Alkenes, Imines, Carbonyls, and Heterocycles
作者:Pengfei Ji、Kuntal Manna、Zekai Lin、Ania Urban、Francis X. Greene、Guangxu Lan、Wenbin Lin
DOI:10.1021/jacs.6b06759
日期:2016.9.21
We report here the synthesis of robust and porous metal-organic frameworks (MOFs), M-MTBC (M = Zr or Hf), constructed from the tetrahedral linker methane-tetrakis(p-biphenylcarboxylate) (MTBC) and two types of secondary building units (SBUs): cubic M8(μ2-O)8(μ2-OH)4 and octahedral M6(μ3-O)4(μ3-OH)4. While the M6-SBU is isostructural with the 12-connected octahedral SBUs of UiO-type MOFs, the M8-SBU
STABILIZATION OF ACTIVE METAL CATALYSTS AT METAL-ORGANIC FRAMEWORK NODES FOR HIGHLY EFFICIENT ORGANIC TRANSFORMATIONS
申请人:The University of Chicago
公开号:US20180361370A1
公开(公告)日:2018-12-20
Metal-organic framework (MOFs) compositions based on post¬synthetic metalation of secondary building unit (SBU) terminal or bridging OH or OH
2
groups with metal precursors or other post-synthetic manipulations are described. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations, including the regioselective boryiation and siiylation of benzyiic C—H bonds, the hydrogenation of aikenes, imines, carbonyls, nitroarenes, and heterocycles, hydroboration, hydrophosphination, and cyclization reactions. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.
Symmetry-Guided Synthesis of Highly Porous Metal-Organic Frameworks with Fluorite Topology
作者:Muwei Zhang、Ying-Pin Chen、Mathieu Bosch、Thomas Gentle、Kecheng Wang、Dawei Feng、Zhiyong U. Wang、Hong-Cai Zhou
DOI:10.1002/anie.201307340
日期:2014.1.13
Two stable, non‐interpenetrated MOFs, PCN‐521 and PCN‐523, were synthesized by a symmetry‐guided strategy. Augmentation of the 4‐connected nodes in the fluorite structure with a rigid tetrahedral ligand and substitution of the 8‐connected nodes by the Zr/Hf clusters yielded MOFs with large octahedral interstitial cavities. They are the first examples of Zr/Hf MOFs with tetrahedral linkers. PCN‐521
通过对称引导策略合成了两个稳定的,非互穿的MOF PCN-521和PCN-523。用刚性四面体配体增强萤石结构中的4个连接节点,并用Zr / Hf团簇取代8个连接节点,从而产生具有大八面体间隙的MOF。它们是具有四面体接头的Zr / Hf MOF的第一个实例。PCN‐521具有最大的BET表面积(3411 m 2 g -1),孔径(20.5×20.5×37.4Å)和由四面体配体形成的MOF的空隙体积(78.5%)。这项工作不仅证明了具有所需拓扑结构的MOF的合理设计的成功实施,而且还为构建具有高孔隙率的非互穿MOF提供了系统的方法。
Aluminum Metal Organic Framework Materials
申请人:TEXAS A&M UNIVERSITY SYSTEM
公开号:US20150152123A1
公开(公告)日:2015-06-04
The invention relates to monocrystalline single crystals of metal-organic framework materials comprising at least one aluminium metal ion, processes for preparing the same, methods for employing the same, and the use thereof. The invention also relates to monocrystalline aluminium metal-organic frameworks.
Unusual Metal–Organic Framework Topology and Radiation Resistance through Neptunyl Coordination Chemistry
作者:Sara E. Gilson、Melissa Fairley、Sylvia L. Hanna、Jennifer E. S. Szymanowski、Patrick Julien、Zhijie Chen、Omar K. Farha、Jay A. LaVerne、Peter C. Burns
DOI:10.1021/jacs.1c08854
日期:2021.10.27
that AAIs may be exploited to give new MOFs and new topologies. To probe its radiation stability, we undertook the first irradiation study of a transuranicMOF and its organic linker building block using high doses of γ rays. Diffraction and spectroscopic data demonstrated that the radiation resistance of NSM is greater than that of its linker building block alone. Approximately 6 MGy of irradiation