scholarly journals Interface-Active Metal Organic Frameworks for Knoevenagel Condensations in Water

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 315 ◽  
Author(s):  
Yanmei Zhang ◽  
Xiang Zhang ◽  
Rixia Bai ◽  
Xiyan Hou ◽  
Jun Li
Keyword(s):  
Knoevenagel Condensation ◽  
Active Catalyst ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Pickering Emulsions ◽  
Reaction Conditions ◽  
Solid Catalysts ◽  
Active Metal ◽  
Metal Organic ◽  
Oil Water

It is desirable but challenging to locate solid catalysts at the oil-water interface to stabilize “Pickering emulsions”, which is one of the promising ways to develop efficient green chemical processes. Herein, water-stable metal organic framework ZIF-8 without any chemical modification was demonstrated to be an interface-active catalyst for Knoevenagel condensation in a biphasic system. Pickering emulsion formed under the reaction conditions due to its amphiphilic property, which was beneficial to the mass transfer and led to high catalytic performance. Moreover, it can be repeatedly applied for Knoevenagel condensation for at least six successive cycles without losing its catalytic activity and framework integrity.

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.

An Efficient and Reusable Multifunctional Composite Magnetic Nanocatalyst for Knoevenagel Condensation

Synlett ◽  
2019 ◽  
Vol 30 (06) ◽  
pp. 699-702 ◽  
Author(s):  
Yu Hu ◽  
Nan Yao ◽  
Jin Tan ◽  
Yang Liu
Keyword(s):  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Knoevenagel Condensation ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Significant Loss ◽  
Magnetic Nanocatalyst ◽  
Metal Organic ◽  
Nife2o4 Nanoparticles ◽  
Organic Framework

A range of multifunctional magnetic metal–organic framework nanomaterials consisting of various mass ratios of the metal–organic framework MIL-53(Fe) and magnetic SiO2@NiFe2O4 nanoparticles were designed, prepared, characterized, and evaluated as heterogeneous catalysts for the Knoevenagel condensation. The as-fabricated nanomaterials, especially the nanocatalyst MIL-53(Fe)@SiO2@NiFe2O4(1.0), showed good catalytic performance in the Knoevenagel condensation at room temperature as a result of synergistic interaction between the Lewis acid iron sites of MIL-53(Fe) and the active sites of the magnetic SiO2@NiFe2O4 nanoparticles. In addition, the heterogeneous catalyst was readily recovered and a recycling test showed that it could be reused for five times without significant loss of its catalytic activity, making it economical and environmentally friendly.

Highly active catalyst for CO2 methanation derived from a metal organic framework template

2017 ◽  
Vol 5 (25) ◽  
pp. 12990-12997 ◽  
Author(s):  
R. Lippi ◽  
S. C. Howard ◽  
H. Barron ◽  
C. D. Easton ◽  
I. C. Madsen ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Metal Organic Framework ◽  
Reaction Conditions ◽  
Co2 Methanation ◽  
Highly Active ◽  
Metal Organic ◽  
Organic Framework

MOF-derived nanocatalysts activated under reaction conditions display remarkable activity when compared to several controls.

Synthesis and click modification of an azido-functionalized Zr(iv) metal–organic framework and a catalytic study

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 893-900 ◽  
Author(s):  
Xiu-Chun Yi ◽  
Fu-Gui Xi ◽  
Yan Qi ◽  
En-Qing Gao
Keyword(s):  
Knoevenagel Condensation ◽  
Metal Organic Framework ◽  
Base Catalyst ◽  
Click Reactions ◽  
Metal Organic ◽  
Organic Framework

A new azido-functionalized Zr(iv) MOF was synthesized and further functionalized via post-synthetic click reactions, and the amino-tagged MOF is a base catalyst for Knoevenagel condensation.

scholarly journals A Zirconium Metal-Organic Framework with SOC Topological Net for Catalytic Peptide Bond Hydrolysis

2021 ◽  
Author(s):  
Sujing Wang ◽  
Antoine Tissot ◽  
Guillaume Maurin ◽  
Tatjana Parac-Vogt ◽  
Christian Serre ◽  
...  
Keyword(s):  
Active Sites ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
Peptide Bond ◽  
Catalytic Performance ◽  
Wide Range ◽  
Horse Heart Myoglobin ◽  
Metal Organic ◽  
Effective Synthesis ◽  
Organic Framework

<div>The discovery of nanozymes for selective cleavage of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the detailed catalytic properties of a microporous zirconium carboxylate metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features an excellent catalytic activity and selectivity, a good tolerance toward reaction conditions covering a wide range of different pH values, and importantly, an exceptional recycling ability associated with easy regeneration process. Taking into account the excellent catalytic performance of MIP-201 and its other advantages such as 6-connected Zr6 cluster active sites, the green, scalable and cost-effective synthesis, and an outstanding chemical and architectural stability, our finding suggests that MIP-201 may be a promising and practical alternative to the current commercially available catalysts for peptide bond hydrolysis.</div>

scholarly journals A Zirconium Metal-Organic Framework with SOC Topological Net for Catalytic Peptide Bond Hydrolysis

2021 ◽  
Author(s):  
Sujing Wang ◽  
Antoine Tissot ◽  
Guillaume Maurin ◽  
Tatjana Parac-Vogt ◽  
Christian Serre ◽  
...  
Keyword(s):  
Active Sites ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
Peptide Bond ◽  
Catalytic Performance ◽  
Wide Range ◽  
Horse Heart Myoglobin ◽  
Metal Organic ◽  
Effective Synthesis ◽  
Organic Framework

<div>The discovery of nanozymes for selective cleavage of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the detailed catalytic properties of a microporous zirconium carboxylate metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features an excellent catalytic activity and selectivity, a good tolerance toward reaction conditions covering a wide range of different pH values, and importantly, an exceptional recycling ability associated with easy regeneration process. Taking into account the excellent catalytic performance of MIP-201 and its other advantages such as 6-connected Zr6 cluster active sites, the green, scalable and cost-effective synthesis, and an outstanding chemical and architectural stability, our finding suggests that MIP-201 may be a promising and practical alternative to the current commercially available catalysts for peptide bond hydrolysis.</div>

scholarly journals Immobilization of Chloroperoxidase in Metal Organic Framework and Its Catalytic Performance

2017 ◽  
Vol 75 (3) ◽  
pp. 293 ◽  
Author(s):  
Ruinan Zhao ◽  
Mancheng Hu ◽  
Shuni Li ◽  
Quanguo Zhai ◽  
Yucheng Jiang
Keyword(s):  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Metal Organic ◽  
Organic Framework

A Solvothermally in Situ Generated Mixed-ligand Approach for NLO-Active Metal−Organic Framework Materials

2005 ◽  
Vol 44 (12) ◽  
pp. 4148-4150 ◽  
Author(s):  
Yong-Tao Wang ◽  
Hai-Hua Fan ◽  
He-Zhou Wang ◽  
Xiao-Ming Chen
Keyword(s):  
Metal Organic Framework ◽  
Mixed Ligand ◽  
Framework Materials ◽  
Active Metal ◽  
Metal Organic ◽  
Organic Framework
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