Metal-organic framework nanosheets as building blocks for molecular sieving membranes

A novel photo-switchable Cu(AzDC)(4,4′-BPE)0.5 membrane was developed with the H2/CO2 separation factor being switched reversibly between 21.3 and 43.7 after irradiation with Vis light (455 nm) and UV (365 nm).

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A three-dimensional porous metal–organic framework with the rutile topology constructed from triangular and distorted octahedral building blocks

Chemical Communications ◽

10.1039/b501477h ◽

2005 ◽

pp. 2402 ◽

Cited By ~ 104

Author(s):

Linhua Xie ◽

Shuxia Liu ◽

Bo Gao ◽

Chundan Zhang ◽

Chunyan Sun ◽

...

Keyword(s):

Metal Organic Framework ◽

Three Dimensional ◽

Porous Metal ◽

Building Blocks ◽

Distorted Octahedral ◽

Metal Organic ◽

Organic Framework

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Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

Nature Communications ◽

10.1038/s41467-020-18776-z ◽

2020 ◽

Vol 11 (1) ◽

Author(s):

Chao Liu ◽

Qiang Sun ◽

Lina Lin ◽

Jing Wang ◽

Chaoqi Zhang ◽

...

Keyword(s):

Rational Design ◽

Materials Science ◽

Metal Organic Framework ◽

Building Blocks ◽

Selective Assembly ◽

Assembly Strategy ◽

Metal Organic ◽

Site Selective ◽

Organic Framework ◽

The Way

Abstract Assembly of different metal-organic framework (MOF) building blocks into hybrid MOF-on-MOF heterostructures is promising in chemistry and materials science, however the development of ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity is challenging. Here we report the synthesis of three types of ternary MOF-on-MOF heterostructures via a multiple selective assembly strategy. This strategy relies on the choice of one host MOF with more than one facet that can arrange the growth of a guest MOF, where the arrangement is site-selective without homogenous growth of guest MOF or homogenous coating of guest on host MOF. The growth of guest MOF on a selected site of host MOF in each step provides the opportunity to further vary the combinations of arrangements in multiple steps, leading to ternary MOF-on-MOF heterostructures with tunable complexity. The developed strategy paves the way towards the rational design of intricate and unprecedented MOF-based superstructures for various applications.

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Interfacial microfluidic processing of metal-organic framework hollow fiber membranes

Science ◽

10.1126/science.1251181 ◽

2014 ◽

Vol 345 (6192) ◽

pp. 72-75 ◽

Cited By ~ 403

Author(s):

Andrew J. Brown ◽

Nicholas A. Brunelli ◽

Kiwon Eum ◽

Fereshteh Rashidi ◽

J. R. Johnson ◽

...

Keyword(s):

Metal Organic Framework ◽

Hollow Fibers ◽

Membrane Fabrication ◽

Separation Factors ◽

Metal Organic ◽

Membrane Defects ◽

Molecular Sieving ◽

Positional Control ◽

Organic Framework

Molecular sieving metal-organic framework (MOF) membranes have great potential for energy-efficient chemical separations, but a major hurdle is the lack of a scalable and inexpensive membrane fabrication mechanism. We describe a route for processing MOF membranes in polymeric hollow fibers, combining a two-solvent interfacial approach for positional control over membrane formation (at inner and outer surfaces, or in the bulk, of the fibers), a microfluidic approach to replenishment or recycling of reactants, and an in situ module for membrane fabrication and permeation. We fabricated continuous molecular sieving ZIF-8 membranes in single and multiple poly(amide-imide) hollow fibers, with H2/C3H8 and C3H6/C3H8 separation factors as high as 370 and 12, respectively. We also demonstrate positional control of the ZIF-8 films and characterize the contributions of membrane defects and lumen bypass.

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Synthesis, Structure, and Properties of a Chiral Zinc(II) Metal-Organic Framework Featuring Linear Trinuclear Secondary Building Blocks

Australian Journal of Chemistry ◽

10.1071/ch12270 ◽

2012 ◽

Vol 65 (12) ◽

pp. 1662 ◽

Cited By ~ 3

Author(s):

Zilu Chen ◽

Chuanbing Zhang ◽

Xianlin Liu ◽

Zhong Zhang ◽

Fupei Liang

Keyword(s):

Building Block ◽

Metal Organic Framework ◽

Three Dimensional ◽

Building Blocks ◽

Triangular Prism ◽

Structure And Properties ◽

Adsorption Selectivity ◽

One Dimensional ◽

Metal Organic ◽

Organic Framework

A chiral metal-organic framework formulated as [Zn3(L-TMTA)2(4,4′-bpy)4]·24H2O (1) was prepared from the reaction of Zn(NO3)2·6H2O with trimesoyltri(L-alanine) (L-TMTAH3) in the presence of 4,4′-bipyridine (4,4′-bpy). Compound 1 features linear trinuclear secondary building blocks [Zn3(syn-syn-COO)2(μ2,η3-COO)2]2+. Each linear trinuclear secondary building block is further linked to another eight ones around it by four L-TMTA3– ligands and eight 4,4′-bpy ligands, leading to the construction of a uninodal three-dimensional framework with triangular prism-like one-dimensional channels. Dehydrated compound 1 displays remarkable adsorption selectivity on CO2 and water vapour over N2 gas.

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