scholarly journals Ionic liquid facilitated melting of the metal-organic framework ZIF-8

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Vahid Nozari ◽  
Courtney Calahoo ◽  
Joshua M. Tuffnell ◽  
David A. Keen ◽  
Thomas D. Bennett ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Ionic Liquid ◽  
Metal Organic Framework ◽  
Interaction Strength ◽  
Decomposition Temperature ◽  
Zeolitic Imidazolate Framework ◽  
New Class ◽  
Metal Organic ◽  
General Guide ◽  
Organic Linker

AbstractHybrid glasses from melt-quenched metal-organic frameworks (MOFs) have been emerging as a new class of materials, which combine the functional properties of crystalline MOFs with the processability of glasses. However, only a handful of the crystalline MOFs are meltable. Porosity and metal-linker interaction strength have both been identified as crucial parameters in the trade-off between thermal decomposition of the organic linker and, more desirably, melting. For example, the inability of the prototypical zeolitic imidazolate framework (ZIF) ZIF-8 to melt, is ascribed to the instability of the organic linker upon dissociation from the metal center. Here, we demonstrate that the incorporation of an ionic liquid (IL) into the porous interior of ZIF-8 provides a means to reduce its melting temperature to below its thermal decomposition temperature. Our structural studies show that the prevention of decomposition, and successful melting, is due to the IL interactions stabilizing the rapidly dissociating ZIF-8 linkers upon heating. This understanding may act as a general guide for extending the range of meltable MOF materials and, hence, the chemical and structural variety of MOF-derived glasses.

scholarly journals Ionic Liquid Facilitated Melting of the Metal-Organic Framework ZIF-8

2021 ◽  
Author(s):  
Vahid Nozari ◽  
Courtney Calahoo ◽  
Joshua M. Tuffnell ◽  
David A. Keen ◽  
Thomas Bennett ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Ionic Liquid ◽  
Metal Organic Framework ◽  
Interaction Strength ◽  
Decomposition Temperature ◽  
Zeolitic Imidazolate Framework ◽  
New Class ◽  
Metal Organic ◽  
General Guide ◽  
Organic Linker

<div>Hybrid glasses from melt-quenched metal-organic frameworks (MOFs) have been emerging as a new class of materials, which combine the functional properties of crystalline MOFs with the processability of glasses. However, only a handful of the vast variety of crystalline MOFs have been identified as being meltable. Porosity and metal-linker interaction strength have both been identified as crucial parameters in the trade-off between thermal decomposition of the organic linker and, more desirably, melting. For example, the inability of the prototypical zeolitic imidazolate framework (ZIF) ZIF-8 to melt, is ascribed to the instability of the organic linker upon dissociation from the metal center. Here, we demonstrate that the incorporation of an ionic liquid (IL) into the porous interior of ZIF-8 provides a means to reduce its melting temperature to below its thermal decomposition temperature (Tm < Td). Experimental evidence shows that the Tm of ZIF-8 obtained by IL infiltration is around 381 °C, and that the glass forming ability (Tg/Tm) of such melts is above 0.9, i.e. higher than those previously reported for other meltable MOFs. Our structural studies show that the prevention of decomposition, and successful melting, is due to the IL interactions stabilizing the rapidly dissociating ZIF-8 linkers upon heating. This understanding may act as a general guide for extending the range of meltable MOF materials and, hence, the chemical and structural variety of MOF-derived glasses.</div>

scholarly journals Ionic Liquid Facilitated Melting of the Metal-Organic Framework ZIF-8

2021 ◽  
Author(s):  
Vahid Nozari ◽  
Courtney Calahoo ◽  
Joshua M. Tuffnell ◽  
David A. Keen ◽  
Thomas Bennett ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Ionic Liquid ◽  
Metal Organic Framework ◽  
Interaction Strength ◽  
Decomposition Temperature ◽  
Zeolitic Imidazolate Framework ◽  
New Class ◽  
Metal Organic ◽  
General Guide ◽  
Organic Linker

<div>Hybrid glasses from melt-quenched metal-organic frameworks (MOFs) have been emerging as a new class of materials, which combine the functional properties of crystalline MOFs with the processability of glasses. However, only a handful of the vast variety of crystalline MOFs have been identified as being meltable. Porosity and metal-linker interaction strength have both been identified as crucial parameters in the trade-off between thermal decomposition of the organic linker and, more desirably, melting. For example, the inability of the prototypical zeolitic imidazolate framework (ZIF) ZIF-8 to melt, is ascribed to the instability of the organic linker upon dissociation from the metal center. Here, we demonstrate that the incorporation of an ionic liquid (IL) into the porous interior of ZIF-8 provides a means to reduce its melting temperature to below its thermal decomposition temperature (Tm < Td). Experimental evidence shows that the Tm of ZIF-8 obtained by IL infiltration is around 381 °C, and that the glass forming ability (Tg/Tm) of such melts is above 0.9, i.e. higher than those previously reported for other meltable MOFs. Our structural studies show that the prevention of decomposition, and successful melting, is due to the IL interactions stabilizing the rapidly dissociating ZIF-8 linkers upon heating. This understanding may act as a general guide for extending the range of meltable MOF materials and, hence, the chemical and structural variety of MOF-derived glasses.</div>

scholarly journals Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hossein Abdollahi-Basir ◽  
Boshra Mirhosseini-Eshkevari ◽  
Farzad Zamani ◽  
Mohammad Ali Ghasemzadeh
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Organic Framework ◽  
One Pot ◽  
Short Reaction Time ◽  
Three Component Reaction ◽  
Metal Organic ◽  
Ft Ir ◽  
Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

Ionic liquid modification of metal-organic framework endows high selectivity for phosphoproteins adsorption

2021 ◽  
Vol 1147 ◽  
pp. 144-154
Author(s):  
Yao-Yao Zhang ◽  
Wang Xu ◽  
Jian-Fang Cao ◽  
Yang Shu ◽  
Jian-Hua Wang
Keyword(s):  
Ionic Liquid ◽  
High Selectivity ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

An in situ investigation of the thermal decomposition of metal-organic framework NH2-MIL-125 (Ti)

2021 ◽  
Vol 316 ◽  
pp. 110957
Author(s):  
Mian Zahid Hussain ◽  
Mounib Bahri ◽  
Werner R. Heinz ◽  
Quanli Jia ◽  
Ovidiu Ersen ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Metal Organic Framework ◽  
In Situ Investigation ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Templated interfacial synthesis of metal-organic framework (MOF) nano- and micro-structures with precisely controlled shapes and sizes

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Lingyao Meng ◽  
Binyu Yu ◽  
Yang Qin
Keyword(s):  
Crystal Growth ◽  
Metal Organic Framework ◽  
Reaction Conditions ◽  
Zeolitic Imidazolate Framework ◽  
Crystallographic Preferred Orientation ◽  
Metal Organic ◽  
Interfacial Synthesis ◽  
Oil Water ◽  
Synthesis Methodology ◽  
Micro Structures

AbstractMetal-organic frameworks (MOF) are an emerging class of microporous materials with promising applications. MOF nanocrystals, and their assembled super-structures, can display unique properties and reactivities when compared with their bulk analogues. MOF nanostructures of 0-D, 2-D, and 3-D dimensions can be routinely obtained by controlling reaction conditions and ligand additives, while formation of 1-D MOF nanocrystals (nanowires and nanorods) and super-structures has been relatively rare. We report here a facile templated interfacial synthesis methodology for the preparation of a series of 1-D MOF nano- and micro-structures with precisely controlled shapes and sizes. Specifically, by applying track-etched polycarbonate (PCTE) membranes as the templates and at the oil/water interface, we rapidly and reproducibly synthesize zeolitic imidazolate framework-8 (ZIF-8) and ZIF-67 nano- and micro structures of sizes ranging from 10 nm to 20 μm. We also identify a size confinement effect on MOF crystal growth, which leads to single crystals under the most restricted conditions and inter-grown polycrystals at larger template pore sizes, as well as surface directing effects that influence the crystallographic preferred orientation. Our findings provide a potentially generalizable method for controlling the size, morphology, and crystal orientations of MOF nanomaterials, as well as offering fundamental understanding into MOF crystal growth mechanisms.

Metal–organic framework-derived CoSe2/(NiCo)Se2 box-in-box hollow nanocubes with enhanced electrochemical properties for sodium-ion storage and hydrogen evolution

2017 ◽  
Vol 5 (35) ◽  
pp. 18823-18830 ◽  
Author(s):  
Seung-Keun Park ◽  
Jin Koo Kim ◽  
Yun Chan Kang
Keyword(s):  
Electrochemical Properties ◽  
Hydrogen Evolution ◽  
Metal Organic Framework ◽  
Sodium Ion ◽  
Zeolitic Imidazolate Framework ◽  
Box Structures ◽  
Ion Storage ◽  
Metal Organic ◽  
Sodium Ion Storage ◽  
Organic Framework

Multishell structured metal selenide nanocubes, namely, Co/(NiCo)Se2 box-in-box structures with different shell compositions, were successfully synthesized by applying zeolitic imidazolate framework-67 (ZIF-67) as a template.

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