Zeolitic imidazolate framework as efficient heterogeneous catalyst for the synthesis of ethyl methyl carbonate

Zhou, Xi; Zhang, Hong Ping; Wang, Gongying; Yao, Zhi; Tang, Ying; Zheng, Shan Shan

doi:10.1016/j.molcata.2012.09.006

Cited by 59 publications

(23 citation statements)

References 23 publications

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“…However, the intensity of diffraction peaks in Z-B(DMF) is higher than that in Z-A(MeOH), and this means that Z-B(DMF) has higher symmetric planes. e FT-IR spectra of both Z-A(MeOH) and Z-B(DMF) are displayed in Figure 1(b), and the findings are consistent with earlier reported results [19,23,24]. e bands at 3122 cm −1 and 2920 cm −1 are associated with the aromatic and the aliphatic C-H asymmetric stretching vibrations, respectively.…”

Section: Structural Properties Of Z-a(meoh) and Z-b(dmf)supporting

confidence: 88%

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Thanh²,

Hiếu

2019

Advances in Materials Science and Engineering

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In the present study, the zeolitic imidazolate framework-8 (ZIF-8) was synthesized at both room temperature and high temperatures. The effects of solvents, molar ratios of precursors, reaction time, and temperature on the structural properties of the as-prepared materials were investigated. Moreover, the surface morphologies of the obtained specimens were characterized using X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, and nitrogen adsorption methods. The results show that ZIF-8 was formed in methanol and water at room temperature and in dimethylformamide (DMF) at high temperatures. Further, in methanol, the molar ratios of precursors and reaction time have negligible effects on the morphologies and structures of ZIF-8; however, in DMF, the reaction temperature has a significant influence on the microstructures of ZIF-8. The catalytic activities of the obtained materials were evaluated using the Knoevenagel condensation reaction, and ZIF-8 proves to be an excellent solid base catalyst.

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Section: Structural Properties Of Z-a(meoh) and Z-b(dmf)supporting

confidence: 88%

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Thanh²,

Hiếu

2019

Advances in Materials Science and Engineering

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“…Zeolitic imidazolate frameworks (ZIFs) are a class of metal‐organic frameworks (MOFs), which are highly porous crystalline materials composed of successive and periodic linkage of transition metal ions with imidazole‐based organic linkers . Owing to their high porosity, thermal/chemical stability, surface functionalities, and versatile synthesis methodology, ZIFs have been explored in various applications including gas storage and separation, catalysis, biomedical applications, and in the fabrication of various nanostructures . In recent years, much attention has been paid to the usage of MOFs as porous heterogeneous catalysts for the conversion of CO 2 into cyclic carbonates through an atom economy reaction by using various epoxides .…”

Section: Introductionmentioning

confidence: 99%

Highly Hydrophobic ZIF‐8/Carbon Nitride Foam with Hierarchical Porosity for Oil Capture and Chemical Fixation of CO₂

Kim

Büyükçakır

et al. 2017

Adv Funct Materials

131

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The introduction of hierarchical porosity into metal-organic frameworks (MOFs) has been of considerable interest in gas separation and heterogeneous catalysis due to the efficient mass transfer kinetics through meso/ macropores. Here, a facile, scalable approach is reported for the preparation of carbon nitride (CN) foams as structural templates with micrometer-sized pores and high nitrogen content of 25.6 wt% by the fast carbonization of low-cost melamine foam. The nitrogen functionalities of CN foam facilitate chemical anchoring and growth of ZIF-8 (zeolitic imidazolate frameworks) crystals, which leads to the development of hierarchical porosity. The growth of ZIF-8 crystals also renders CN foam, which is hydrophilic in nature, highly hydrophobic exhibiting 135° of water contact angle due to the enhanced surface roughness, thus creating a natural shield for the MOF crystals against water. The introduction of ZIF-8 crystals onto the CN foam enables selective absorption of oils up to 58 wt% from water/oil mixtures and also facilitates the highly efficient conversion of CO 2 to chloropropene carbonate in a quantitative yield with excellent product selectivity. Importantly, this present approach could be extended to the vast number of MOF structures, including the ones suffering from water instability, for the preparation of highly functional materials for various applications.

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“…The combination of the metal salts and midazole ligand as dual acid-base catalysts also exerted an unsatisfactory catalytic performance (Entry 5), which could be explained by the difficulty of manipulating the positions of the active species, thusi nducing acid-base interference in ah omogeneouss ystem. [44,62] Interestingly,c onsiderable epichlorohydrin conversionsa sw ell as high cyclic carbonate selectivities could be achieved when ZIFs (i.e. ZIF-8, ZIF-67, and ZnCo-ZIF) were employed as catalysts under the identical conditions (Figure 4a), clearly revealing the advantage of synergistic interactions between the Lewisa cidic (Zn/Co)a nd Lewis basic (HmIm) sites in ZIFs framework and their roles in the coupling reactiono fe pichlorohydrin with CO 2 .T he framework of ZIFs providedp orouss tructure for the reactants to interact with these active centers, which was beneficial for the reaction.…”

Section: Catalytic Cycloaddition Of Co 2 With Epoxidementioning

confidence: 99%

Hollow Zn−Co Based Zeolitic Imidazole Framework as a Robust Heterogeneous Catalyst for Enhanced CO₂ Chemical Fixation

Song

et al. 2019

Chemistry An Asian Journal

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The efficient chemical conversion of carbon dioxide (CO2) into value‐added fine chemicals is an intriguing but challenging route in sustainable chemistry. Herein, a hollow‐structured bimetallic zeolitic imidazole framework composed of Zn and Co as metal centers (H‐ZnCo‐ZIF) has been successfully prepared via a post‐synthetic strategy based on controllable chemical‐etching of the preformed solid ZnCo‐ZIF in tannic acid. The creation of hollow cavities inside each monocrystalline ZIFs could be achieved without destroying the intrinsic frameworks, as characterized by field‐emission scanning electron microscopy, transmission electron microscopy, and X‐ray diffraction technologies. The as‐synthesized H‐ZnCo‐ZIF exhibited remarkable catalytic activity in the cycloaddition of CO2 with epoxides to the corresponding cyclic carbonates, outperforming the solid ZnCo‐ZIF analogue due to the improved mass transfer originating from the hollow structure. More importantly, due to stabilization of metal centers in the ZIF framework by the tannic acid shell, H‐ZnCo‐ZIF exhibited good recyclability, and no activity loss could be observed in six runs. The present study provides a simple and effective strategy to enhance the catalytic performance of ZIFs by creating a hollow structure via chemical etching.

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Zeolitic imidazolate framework as efficient heterogeneous catalyst for the synthesis of ethyl methyl carbonate

Cited by 59 publications

References 23 publications

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Highly Hydrophobic ZIF‐8/Carbon Nitride Foam with Hierarchical Porosity for Oil Capture and Chemical Fixation of CO₂

Hollow Zn−Co Based Zeolitic Imidazole Framework as a Robust Heterogeneous Catalyst for Enhanced CO₂ Chemical Fixation

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Zeolitic imidazolate framework as efficient heterogeneous catalyst for the synthesis of ethyl methyl carbonate

Cited by 59 publications

References 23 publications

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Evaluation of Structural Properties and Catalytic Activities in Knoevenagel Condensation Reaction of Zeolitic Imidazolate Framework-8 Synthesized under Different Conditions

Highly Hydrophobic ZIF‐8/Carbon Nitride Foam with Hierarchical Porosity for Oil Capture and Chemical Fixation of CO2

Hollow Zn−Co Based Zeolitic Imidazole Framework as a Robust Heterogeneous Catalyst for Enhanced CO2 Chemical Fixation

Contact Info

Product

Resources

About

Highly Hydrophobic ZIF‐8/Carbon Nitride Foam with Hierarchical Porosity for Oil Capture and Chemical Fixation of CO₂

Hollow Zn−Co Based Zeolitic Imidazole Framework as a Robust Heterogeneous Catalyst for Enhanced CO₂ Chemical Fixation