scholarly journals Bifunctional Heterometallic Metal-Organic Frameworks for Solvent-Free Heterogeneous Cascade Catalysis

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 309 ◽  
Author(s):  
Mingming Zheng ◽  
Yanxiang Wang ◽  
Pingyun Feng
Keyword(s):  
Lewis Acids ◽  
Active Sites ◽  
Metal Organic Frameworks ◽  
Significant Loss ◽  
Solvent Free ◽  
Knoevenagel Reaction ◽  
One Pot ◽  
Free System ◽  
Metal Organic ◽  
The One

A family of heterometallic metal-organic frameworks (MOFs) (CPM200s) harmoniously coexisting as Lewis acids and base (azo) sites were prepared. Seven CPM200s were employed as multifunctional heterogeneous cascade catalysts for the one-pot deacetalization-Knoevenagel reaction in a solvent-free system. Benefiting from the cooperation between Lewis acids from the open metal sites and base sites from the ligands, the CPM200s showed high activity and selectivity for the tandem reaction. The heterometallic 3D porous framework reported here not only offers a combination of two opposite active sites in the same framework of materials but also increases mass transfer of the substrate, thus maximizing the efficiency and substrate selectivity of the bifunctional catalysts. The CPM200s showed the highest turnover frequency (TOF), outperforming that of the reported MOFs in tandem with the deacetalization-Knoevenagel reaction. A strong correlation between the TOF and charge-to-radius ratio (z/r) of metal ions in the CPM200s was observed for the first time. The bifunctional CPM200s catalysts can be reused five times without significant loss of activity.

Hf-based metal organic frameworks as bifunctional catalysts for the one-pot conversion of furfural to γ-valerolactone

2019 ◽  
Vol 472 ◽  
pp. 17-26 ◽  
Author(s):  
Wenke Li ◽  
Zhe Cai ◽  
Hang Li ◽  
Yu Shen ◽  
Yongqiang Zhu ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Bifunctional Catalysts ◽  
One Pot ◽  
Metal Organic ◽  
The One

scholarly journals Cu-metal organic frameworks (Cu-MOF) as an environment-friendly and economical catalyst for one pot synthesis of tacrine derivatives

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 1995-2003 ◽  
Author(s):  
Hoda Mollabagher ◽  
Salman Taheri ◽  
Mohammad majid Mojtahedi ◽  
SeyedAmirhossein Seyedmousavi
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Frameworks ◽  
One Pot ◽  
Environment Friendly ◽  
One Pot Synthesis ◽  
Metal Organic ◽  
The One

The present work describes the catalytic activity of Cu-MOF for the one-pot synthesis of tacrine derivatives via a four-component reaction of 2-hydroxynaphthalene-1,4-dione, aldehydes, malononitrile and cycloketones in the presence of AlCl3.

scholarly journals MIL-101(Cr), an Efficient Heterogeneous Catalyst for One Pot Synthesis of 2,4,5-tri Substituted Imidazoles under Solvent Free Conditions

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 845
Author(s):  
Faranak Manteghi ◽  
Fatemeh Zakeri ◽  
Owen James Guy ◽  
Zari Tehrani
Keyword(s):  
Heterogeneous Catalyst ◽  
Metal Organic Framework ◽  
Solvent Free ◽  
Proton Nuclear Magnetic Resonance ◽  
One Pot ◽  
Acceptable Result ◽  
Solvent Free Conditions ◽  
Metal Organic ◽  
The One ◽  
High Yields

A chromium-containing metal-organic framework (MOF), MIL-101 (Chromium(III) benzene-1,4-dicarboxylate), was used to catalyze the one pot, three component synthesis of some 2,4,5-trisubstituted imidazoles under solvent-free conditions. The advantages of using this heterogeneous catalyst include short reaction time, high yields, easy and quick isolation of catalyst and products, low amount of catalyst needed, and that the addition of solvent, salt, and additives are not needed. This catalyst is highly efficient and can be recovered at least 5 times with a slight loss of efficiency. The structure of the metal-organic frameworks (MOF) was confirmed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (HNMR) were performed to confirm some of the synthesized products. Experimental data indicated that the optimum amount of catalyst was 5 mg for benzil (1 mmol), 4-chlorobenzaldehyde (1 mmol), and ammonium acetate (2.5 mmol), and the synthetic route to the various imidazoles is performed in 10 min by 95% yield, an acceptable result rivalling those of other catalysts.

scholarly journals One-Pot, Room-Temperature Conversion of CO2 into Porous Metal−Organic Frameworks

2020 ◽  
Author(s):  
Kentaro Kadota ◽  
You-Lee Hong ◽  
Yusuke Nishiyama ◽  
Easan Sivaniah ◽  
Daniel Packwood ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Metal Organic Frameworks ◽  
Porous Metal ◽  
One Pot ◽  
Surface Areas ◽  
Piperazine Derivatives ◽  
Metal Organic ◽  
The One ◽  
Crystalline Metal ◽  
Highly Porous

We demonstrate the one-pot synthesis of highly porous crystalline metal−organic frameworks, [Zn<sub>4</sub>O(piperazine dicarbamate)<sub>3</sub>], an analogue of [Zn<sub>4</sub>O(1,4-benzenedicarboxylate)<sub>3</sub>] (MOF-5), directly from atmospheric pressure CO<sub>2</sub> gas and piperazine derivatives at 25 °C. The structures showed high CO<sub>2</sub> contents over 30 wt% and surface areas of 1270−2366 m<sup>2</sup> g<sup>−1</sup>. We also show that the synthesis is feasible even by the use of 400 ppm of CO<sub>2</sub>.

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.

MIL-53(Fe) Metal-Organic Frameworks (MOFs) as an Efficient and Reusable Catalyst for the One-Pot Four-Component Synthesis of Pyrano[2,3-c]-pyrazoles

2018 ◽  
Vol 33 (1) ◽  
pp. e4679 ◽  
Author(s):  
Mohammad Ali Ghasemzadeh ◽  
Boshra Mirhosseini-Eshkevari ◽  
Mohammad Hossein Abdollahi-Basir
Keyword(s):  
Metal Organic Frameworks ◽  
Reusable Catalyst ◽  
One Pot ◽  
Metal Organic ◽  
The One

scholarly journals One-Pot, Room-Temperature Conversion of CO2 into Porous Metal−Organic Frameworks

2020 ◽  
Author(s):  
Kentaro Kadota ◽  
You-Lee Hong ◽  
Yusuke Nishiyama ◽  
Easan Sivaniah ◽  
Daniel Packwood ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Metal Organic Frameworks ◽  
Porous Metal ◽  
One Pot ◽  
Surface Areas ◽  
Piperazine Derivatives ◽  
Metal Organic ◽  
The One ◽  
Crystalline Metal ◽  
Highly Porous

We demonstrate the one-pot synthesis of highly porous crystalline metal−organic frameworks, [Zn<sub>4</sub>O(piperazine dicarbamate)<sub>3</sub>], an analogue of [Zn<sub>4</sub>O(1,4-benzenedicarboxylate)<sub>3</sub>] (MOF-5), directly from atmospheric pressure CO<sub>2</sub> gas and piperazine derivatives at 25 °C. The structures showed high CO<sub>2</sub> contents over 30 wt% and surface areas of 1270−2366 m<sup>2</sup> g<sup>−1</sup>. We also show that the synthesis is feasible even by the use of 400 ppm of CO<sub>2</sub>.

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