Site-Dependent Substitutions in Mixed-Metal Metal–Organic Frameworks: A Case Study and Guidelines for Analogous Systems

2014 ◽  
Vol 27 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Romain Sibille ◽  
Thomas Mazet ◽  
Bernard Malaman ◽  
Qirong Wang ◽  
Emilie Didelot ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Mixed Metal ◽  
Metal Metal ◽  
Metal Organic

A direct solvent-free conversion approach to prepare mixed-metal metal–organic frameworks from doped metal oxides

2021 ◽  
Vol 57 (29) ◽  
pp. 3587-3590
Author(s):  
Beili Yi ◽  
Haojie Zhao ◽  
Yue Zhang ◽  
Xiaomeng Si ◽  
Guanqun Zhang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Metal Organic Frameworks ◽  
Solvent Free ◽  
Mixed Metal ◽  
Synthesis Strategy ◽  
Metal Metal ◽  
Metal Organic

We propose a novel solvent-free conversion strategy of Pt–ZnO to Pt-ZIF-8. This synthesis strategy may facilitate the discovery of MMOFs that have not been reported previously.

Mixed-Metal Metal–Organic Frameworks as Catalysts for Liquid-Phase Oxidation of Toluene and Cycloalkanes

2017 ◽  
Vol 42 (10) ◽  
pp. 4383-4390 ◽  
Author(s):  
Abdul Malik P. Peedikakkal ◽  
Abiola Azeez Jimoh ◽  
M. Nasiruzzaman Shaikh ◽  
Bassam El Ali
Keyword(s):  
Liquid Phase ◽  
Metal Organic Frameworks ◽  
Liquid Phase Oxidation ◽  
Mixed Metal ◽  
Metal Metal ◽  
Phase Oxidation ◽  
Metal Organic

scholarly journals Upgrading the Hydrogen Storage of MOF-5 by Post-Synthetic Exchange with Divalent Metal Ions

2021 ◽  
Vol 11 (24) ◽  
pp. 11687
Author(s):  
Abdul Malik P. Peedikakkal ◽  
Isam H. Aljundi
Keyword(s):  
Metal Ions ◽  
Adsorption Isotherms ◽  
Metal Organic Frameworks ◽  
Hydrogen Uptake ◽  
Metal Exchange ◽  
Mixed Metal ◽  
H2 Adsorption ◽  
Hydrogen Molecules ◽  
Metal Metal ◽  
Metal Organic

In metal-organic frameworks (MOFs), mixed-metal clusters have the opportunity to adsorb hydrogen molecules due to a greater charge density of the metal. Such interactions may subsequently enhance the gravimetric uptake of hydrogen. However, only a few papers have explored the ability of mixed-metal MOFs to increase hydrogen uptake. The present work reveals the preparation of mixed metal metal-organic frameworks M-MOF-5 (where M = Ni2+, Co2+, and Fe2+) (where MOF-5 designates MOFs such as Zn2+ and 1,4-benzenedicarboxylic acid ligand) using the post-synthetic exchange (PSE) technique. Powder X-ray diffraction patterns and scanning electron microscopy images indicate the presence of crystalline phases after metal exchange, and the inductively coupled plasma–mass spectroscopy analysis confirmed the exchange of metals by means of the PSE technique. The nitrogen adsorption isotherms established the production of microporous M-MOF-5. Although the additional metal ions decreased the surface area, the exchanged materials displayed unique features in the gravimetric uptake of hydrogen. The parent MOF-5 and the metal exchanged materials (Ni-MOF-5, Co-MOF-5, and Fe-MOF-5) demonstrated hydrogen capacities of 1.46, 1.53, 1.53, and 0.99 wt.%, respectively. The metal-exchanged Ni-MOF-5 and Co-MOF-5 revealed slightly higher H2 uptake in comparison with MOF-5; however, the Fe-MOF-5 showed a decrease in uptake due to partial discrete complex formation (discrete complexes with one or more metal ions) with less crystalline nature. The Sips model was found to be excellent in describing the H2 adsorption isotherms with a correlation coefficient ≅ 1. The unique hydrogen uptakes of Ni− and Co-MOF-5 shown in this study pave the way for further improvement in hydrogen uptake.

Mechanochemistry Enables Targeted Synthesis of Mixed-Metal Microporous Metal-Organic Frameworks Using Pre-Assembled Precursors

2019 ◽  
Author(s):  
Ghada Ayoub ◽  
Bahar Karadeniz ◽  
Ashlee J. Howarth ◽  
Omar Farha ◽  
Ivica Đilović ◽  
...  
Keyword(s):  
Ball Milling ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Stoichiometric Composition ◽  
Stoichiometric Ratio ◽  
Rapid Synthesis ◽  
Mixed Metal ◽  
Main Group Metals ◽  
Metal Metal ◽  
Metal Organic

Ball milling mechanochemistry enables enables targeted, rapid synthesis of mixed-metal metal-organic frameworks (MOFs) with controllable stoichiometric composition. Specifically, the use of ball milling enabled the use of pre-assembled coordination polymers of zinc, magnesium, nickel(II) and cobalt(II) as precursors in an innovative mechanochemical strategy for the deliberate assembly of mixed-metal MOF-74 materials comprised of pairs of transition of main group metals in a pre-determinmed 1:1 stoichiometric ratio, including ZnMg-, ZnCo, ZnCu, MgZn-, MgCo-, MgCa-, NiZn-,NiMg-, NiCo-, CoZn-, CoMg- and CoCu-MOF-74. While this is the first example of target-oriented MOF synthesis using mechanochemistry, it also provides an entry to controlling the stoichiometric composition of mixed-metal frameworks.<br>

scholarly journals Mixed-metal metal–organic frameworks

2019 ◽  
Vol 48 (9) ◽  
pp. 2535-2565 ◽  
Author(s):  
Sara Abednatanzi ◽  
Parviz Gohari Derakhshandeh ◽  
Hannes Depauw ◽  
François-Xavier Coudert ◽  
Henk Vrielinck ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Ions ◽  
Metal Organic Frameworks ◽  
Gas Sorption ◽  
Mixed Metal ◽  
Metal Metal ◽  
Metal Organic

Mixed-metal MOFs contain at least 2 different metal ions presenting promising potential in heterogeneous catalysis, gas sorption/separation, luminescence and sensing.

Mechanochemistry Enables Targeted Synthesis of Mixed-Metal Microporous Metal-Organic Frameworks Using Pre-Assembled Precursors

2019 ◽  
Author(s):  
Ghada Ayoub ◽  
Bahar Karadeniz ◽  
Ashlee J. Howarth ◽  
Omar Farha ◽  
Ivica Đilović ◽  
...  
Keyword(s):  
Ball Milling ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Stoichiometric Composition ◽  
Stoichiometric Ratio ◽  
Rapid Synthesis ◽  
Mixed Metal ◽  
Main Group Metals ◽  
Metal Metal ◽  
Metal Organic

Ball milling mechanochemistry enables enables targeted, rapid synthesis of mixed-metal metal-organic frameworks (MOFs) with controllable stoichiometric composition. Specifically, the use of ball milling enabled the use of pre-assembled coordination polymers of zinc, magnesium, nickel(II) and cobalt(II) as precursors in an innovative mechanochemical strategy for the deliberate assembly of mixed-metal MOF-74 materials comprised of pairs of transition of main group metals in a pre-determinmed 1:1 stoichiometric ratio, including ZnMg-, ZnCo, ZnCu, MgZn-, MgCo-, MgCa-, NiZn-,NiMg-, NiCo-, CoZn-, CoMg- and CoCu-MOF-74. While this is the first example of target-oriented MOF synthesis using mechanochemistry, it also provides an entry to controlling the stoichiometric composition of mixed-metal frameworks.<br>

Pre-Programed Hydroxy Double Salt Templates for Room-Temperature Controlled Synthesis of Mixed-Metal Zeolitic Imidazolate Frameworks

2021 ◽  
Author(s):  
Yixin Chen ◽  
Shuchang Yuan ◽  
Yujia Li ◽  
Yongqun Ma ◽  
Chenxiao Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Adsorption ◽  
Metal Organic Frameworks ◽  
Electrochemical Energy Storage ◽  
Controlled Synthesis ◽  
Zeolitic Imidazolate Frameworks ◽  
Mixed Metal ◽  
Metal Metal ◽  
Metal Organic ◽  
Temperature Controlled

Mixed-metal metal-organic frameworks (mmMOFs) are promising for many envisioned applications such as gas adsorption, separations, catalysis and electrochemical energy storage. However, it is still very challenging to achieve controlled stoichiometric...

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