Combining Coordination Modulation with Acid–Base Adjustment for the Control over Size of Metal–Organic Frameworks

2012 ◽  
Vol 24 (3) ◽  
pp. 444-450 ◽  
Author(s):  
Hailing Guo ◽  
Yongzhong Zhu ◽  
Song Wang ◽  
Shengqun Su ◽  
Liang Zhou ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Acid Base ◽  
Metal Organic

scholarly journals Hf-based metal–organic frameworks as acid–base catalysts for the transformation of biomass-derived furanic compounds into chemicals

2018 ◽  
Vol 20 (13) ◽  
pp. 3081-3091 ◽  
Author(s):  
Sergio Rojas-Buzo ◽  
Pilar García-García ◽  
Avelino Corma
Keyword(s):  
Aldol Condensation ◽  
Condensation Reaction ◽  
Metal Organic Frameworks ◽  
Acid Base ◽  
Base Catalysts ◽  
Metal Organic ◽  
Furanic Compounds

Hafnium-based metal–organic frameworks are promising catalysts for upgrading biomass derivatives via an aldol condensation reaction.

One-pot synthesis of bimetallic metal–organic frameworks (MOFs) as acid–base bifunctional catalysts for tandem reaction

2020 ◽  
Vol 10 (2) ◽  
pp. 315-322 ◽  
Author(s):  
Yanjing Hu ◽  
Jian Zhang ◽  
Hang Huo ◽  
Zhe Wang ◽  
Xianzhu Xu ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Bifunctional Catalysts ◽  
Pore System ◽  
Acid Base ◽  
One Pot ◽  
System P ◽  
Synergistic Mechanism ◽  
Metal Organic ◽  
Hierarchical Pore System ◽  
Hierarchical Pore

Bimetallic MIL-101(Al/Fe)–NH2 exhibits enhanced acid–base bifunctional catalytic activity due to its synergistic mechanism and hierarchical pore system.

scholarly journals Solvent-Dependent Stability of Highly Defective UiO-66 to Acids and Bases

2021 ◽  
Author(s):  
Daniele Cartagenova ◽  
Fabio A. Peixoto Esteves ◽  
Nathan T. Fischer ◽  
Jeroen A. van Bokhoven ◽  
Marco Ranocchiari
Keyword(s):  
Organic Solvents ◽  
Crystalline Structure ◽  
Metal Organic Frameworks ◽  
Textural Properties ◽  
Systematic Investigation ◽  
Acid Base ◽  
Metal Organic ◽  
Acids And Bases ◽  
The Stability ◽  
Strong Acids

UiO-66 is one of the most chemically stable Metal-organic frameworks (MOFs) available. However, little is known about its stability in organic solvents. In this study, we synthesized a highly defective UiO-66 (HD-UiO-66) and explored how its textural properties change when exposed to weak and strong acids, both organic and inorganic in nature, and dissolved in different solvents, water, dichloromethane (DCM), and tetrahydrofuran (THF). Exposing defective UiO-66 to weak acids and bases, such as acetic acid and triethylamine, maintains its crystalline structure and porosity, irrespective of the solvent. Sulphuric acid decomposes HD-UiO-66 in organic solvents but not in water, trifluoroacetic acid decomposes the framework only in DCM. Tetramethylguanidine decomposes HD-UiO-66 in organic solvents but mantains some of the MOFs porosity and crystalline structure in water, whereas potassium carbonate damages the MOF to a greater extent in water than in organic solvents. Our results show that the acid/base properties of the solvent modulate the strength of acids and bases and its polarity determines the extent of their solvation, thus playing a crucial role in altering the MOF’s textural properties. This systematic investigation highlights the central role played by the solvent in tuning the stability of MOFs, which is relevant for liquid-phase applications in acidic and basic environments, such as catalysis and adsorption.

scholarly journals Solvent-Dependent Stability of Highly Defective UiO-66 to Acids and Bases

2021 ◽  
Author(s):  
Daniele Cartagenova ◽  
Fabio A. Peixoto Esteves ◽  
Nathan T. Fischer ◽  
Jeroen A. van Bokhoven ◽  
Marco Ranocchiari
Keyword(s):  
Organic Solvents ◽  
Crystalline Structure ◽  
Metal Organic Frameworks ◽  
Textural Properties ◽  
Systematic Investigation ◽  
Acid Base ◽  
Metal Organic ◽  
Acids And Bases ◽  
The Stability ◽  
Strong Acids

UiO-66 is one of the most chemically stable Metal-organic frameworks (MOFs) available. However, little is known about its stability in organic solvents. In this study, we synthesized a highly defective UiO-66 (HD-UiO-66) and explored how its textural properties change when exposed to weak and strong acids, both organic and inorganic in nature, and dissolved in different solvents, water, dichloromethane (DCM), and tetrahydrofuran (THF). Exposing defective UiO-66 to weak acids and bases, such as acetic acid and triethylamine, maintains its crystalline structure and porosity, irrespective of the solvent. Sulphuric acid decomposes HD-UiO-66 in organic solvents but not in water, trifluoroacetic acid decomposes the framework only in DCM. Tetramethylguanidine decomposes HD-UiO-66 in organic solvents but mantains some of the MOFs porosity and crystalline structure in water, whereas potassium carbonate damages the MOF to a greater extent in water than in organic solvents. Our results show that the acid/base properties of the solvent modulate the strength of acids and bases and its polarity determines the extent of their solvation, thus playing a crucial role in altering the MOF’s textural properties. This systematic investigation highlights the central role played by the solvent in tuning the stability of MOFs, which is relevant for liquid-phase applications in acidic and basic environments, such as catalysis and adsorption.

scholarly journals Solvent-Dependent Stability of Highly Defective UiO-66 to Acids and Bases

2021 ◽  
Author(s):  
Daniele Cartagenova ◽  
Fabio A. Peixoto Esteves ◽  
Nathan T. Fischer ◽  
Jeroen A. van Bokhoven ◽  
Marco Ranocchiari
Keyword(s):  
Organic Solvents ◽  
Crystalline Structure ◽  
Metal Organic Frameworks ◽  
Textural Properties ◽  
Systematic Investigation ◽  
Acid Base ◽  
Metal Organic ◽  
Acids And Bases ◽  
The Stability ◽  
Strong Acids

UiO-66 is one of the most chemically stable Metal-organic frameworks (MOFs) available. However, little is known about its stability in organic solvents. In this study, we synthesized a highly defective UiO-66 (HD-UiO-66) and explored how its textural properties change when exposed to weak and strong acids, both organic and inorganic in nature, and dissolved in different solvents, water, dichloromethane (DCM), and tetrahydrofuran (THF). Exposing defective UiO-66 to weak acids and bases, such as acetic acid and triethylamine, maintains its crystalline structure and porosity, irrespective of the solvent. Sulphuric acid decomposes HD-UiO-66 in organic solvents but not in water, trifluoroacetic acid decomposes the framework only in DCM. Tetramethylguanidine decomposes HD-UiO-66 in organic solvents but mantains some of the MOFs porosity and crystalline structure in water, whereas potassium carbonate damages the MOF to a greater extent in water than in organic solvents. Our results show that the acid/base properties of the solvent modulate the strength of acids and bases and its polarity determines the extent of their solvation, thus playing a crucial role in altering the MOF’s textural properties. This systematic investigation highlights the central role played by the solvent in tuning the stability of MOFs, which is relevant for liquid-phase applications in acidic and basic environments, such as catalysis and adsorption.

Acid-Base Bifunctional Metal-Organic Frameworks: Green Synthesis and Application in One-Pot Glucose to 5-HMF Conversion

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1850132 ◽  
Author(s):  
Yunlei Zhang ◽  
Pei Jin ◽  
Minjia Meng ◽  
Lin Gao ◽  
Meng Liu ◽  
...  
Keyword(s):  
Active Sites ◽  
Large Scale ◽  
Direct Synthesis ◽  
Metal Organic Frameworks ◽  
Acid Base ◽  
One Pot ◽  
Ring Opening Reaction ◽  
Metal Organic ◽  
Base Strength ◽  
Viable Approach

The direct synthesis of metal-organic frameworks (MOFs) with acidic and basic active sites is challenging due to the introduction of functional groups by post-functionalization method often jeopardize the framework integrity. Herein, we report the direct synthesis of acid-base bi-functional MOFs with tuning acid-base strength. Employing modulated hydrothermal (MHT) approach, microporous MOFs named UiO-66-NH2 was prepared. Through the ring-opening reaction of 1,3-propanesultone with amino group, UiO-66-NH2-SO3H-type catalysts can be obtained. The synthesized catalysts were well characterized and their catalytic performances were evaluated in one-pot glucose to 5-HMF conversion. Results revealed the acid-base bi-functional catalyst possessed high activity and excellent stability. This work provides a general and economically viable approach for the large-scale synthesis of acid-base bi-functional MOFs for their potential use in catalysis field.

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