An Ultrastable and Easily Regenerated Hydrogen-Bonded Organic Molecular Framework with Permanent Porosity
作者:Falu Hu、Caiping Liu、Mingyan Wu、Jiandong Pang、Feilong Jiang、Daqiang Yuan、Maochun Hong
DOI:10.1002/anie.201610901
日期:2017.2.13
A robust hydrogen‐bondedorganicframework HOF‐TCBP (H4TCBP=3,3′,5,5′‐tetrakis‐(4‐carboxyphenyl)‐1,1′‐biphenyl) has been successfully constructed and structurally characterized. It possesses a permanent 3D porous structure with a 5‐fold interpenetrated dia topological network. This activated HOF‐TCBP has a high BET surface area of 2066 m2 g−1 and is capable of highly selective adsorption and separation
已经成功构建了坚固的氢键有机骨架HOF-TCBP(H 4 TCBP = 3,3',5,5'-四(4-羧基苯基)-1,1'-联苯)并进行了结构表征。它具有用5倍互穿的永久三维多孔结构直径拓扑网络。这种活化的HOF-TCBP具有2066 m 2 g -1的高BET表面积,并且能够在环境条件下高度选择性地吸附和分离轻质烃。如PXRD实验和N 2吸附测试所示,它具有出色的热稳定性。HOF-TCBP易于制备和通过旋转蒸发进行更新,可促进其实际使用。
Flexible Zirconium MOFs as Bromine-Nanocontainers for Bromination Reactions under Ambient Conditions
作者:Jiandong Pang、Shuai Yuan、Dongying Du、Christina Lollar、Liangliang Zhang、Mingyan Wu、Daqiang Yuan、Hong-Cai Zhou、Maochun Hong
DOI:10.1002/anie.201709186
日期:2017.11.13
and applied to reversible bromine encapsulation and release. The chemical stability of these Zr‐MOFs ensures the framework's integrity during the bromine adsorption, while the framework's flexibility allows for structural adaptation upon bromine uptake to afford stronger host–guest interactions and therefore higher bromine adsorption capacities. The flexible MOFs act as bromine‐nanocontainers which elongate
Toward Topology Prediction in Zr-Based Microporous Coordination Polymers: The Role of Linker Geometry and Flexibility
作者:Jialiu Ma、Ly D. Tran、Adam J. Matzger
DOI:10.1021/acs.cgd.6b00698
日期:2016.7.6
geometric analysis of linker shape and flexibility is developed in the context of achieving predictable topology of tetratopic-linker based Zr microporous coordination polymers (MCPs). Tetratopic linkers are categorized into tetrahedral, planar square, or planar rectangular groups based on symmetry with an emphasis on linkerflexibility. A prediction framework solely based on linker shape and cluster connectivity
Binary Solvent Regulated Architecture of Ultra‐Microporous Hydrogen‐Bonded Organic Frameworks with Tunable Polarization for Highly‐Selective Gas Separation
A series of ultra-microporous hydrogen-bonded organicframeworks (HOFs) with controlled open coplanar carboxyl oxygen atoms within the pores have been constructed through an adaptable binarysolvent synthetic strategy. Activated HOFs with enhanced surface polarization show highlyselective adsorption of CO2 over N2 based on differences of molecule polarizability.
Control the Structure of Zr-Tetracarboxylate Frameworks through Steric Tuning
作者:Jiandong Pang、Shuai Yuan、Junsheng Qin、Caiping Liu、Christina Lollar、Mingyan Wu、Daqiang Yuan、Hong-Cai Zhou、Maochun Hong
DOI:10.1021/jacs.7b09973
日期:2017.11.22
Ligands with flexible conformations add to the structural diversity of metal-organic frameworks but, at the same time, pose a challenge to structural design and prediction. Representative examples include Zr-tetracarboxylate-based MOFs, which afford assorted structures for a wide range of applications, but also complicate the structural control. Herein, we systematically studied the formation mechanism of a series of (4,8)-connected Zr-tetracarboxylate-based MOFs by altering the substituents on different positions of the organic linkers. Different ligand rotamers give rise to three types of structures with flu, scu, and csq topologies. A combination of experiment and molecular simulation indicate that the steric hindrance of the substituents at different positions dictates the resulting MOF structures. Additionally, the controllable formation of different structures was successfully implemented by a combination of linkers with different steric effects at specific positions.