n-C22H45N+(CH3)2CH2(CH2)4CH2N(CH3)2Br−: A new effective one-step structure directing agent to synthesize hierarchical MFI zeolite with ordered hexagonal mesopores

Xiao, Zixing; Zhang, Jingshuang; Ding, He; Yang, Cheng; Bai, Peng; Guo, Xianghai

doi:10.1016/j.micromeso.2018.07.008

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…Under the same reaction conditions, HMC 10 (50) catalyst gave 68.8 % conversion with 60 % selectvity of flavanone and 31 % selectivity of chalcone in 24 h. This improvement over other conventional MFI and MCM‐41 is attributed to the well ordered hexagonal mesopores and partially crystallized MFI zeolite domains. But in comparison with other catalysts, these hierarchical MFI/MCM‐41 composites showed lower catalytic performance because of the larger particle size . Thus there is a scope to prepare materials having hierarchial structure with reduced particle size.…”

Section: Heterogeneous Catalysismentioning

confidence: 97%

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Claisen‐Schmidt Condensation using Green Catalytic Processes: A Critical Review

Yadav

Wagh

2020

ChemistrySelect

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Claisen‐Schmidt condensation have historical significance for over140 years and the scope was expanded due to the realization that chalcones so synthesized possess biological activity. The principles of green chemistry with emphasis on use of different solid catalysts with proper distribution of active centers such as acid, base, acid‐base, organo‐ were used along with solvent‐less systems. Among solid bases layered double hydroxides (LDH)/hydrotalcites are the most common. The limitations of solid bases are overcome by solid acids and superacids. A number of metal oxide supports are used. MOFs are increasingly being used. Complex organo‐catalysts are employed for getting excellent regio‐selectivity. In certain metal oxides, both acidic and basic sites co‐exist on the pore surface of catalyst which offer superior results. Synergism of solid catalysis using microwaves and ultrasound to intensify rates and selectivity is in vogue.Controlled pore structure and distribution of active catalytic centers, whether mono‐, bi‐ or tri‐functional catalysts, will give better green and smart processes. The review gives a critical analysis of the area and presents future directions for research.

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Section: Heterogeneous Catalysismentioning

confidence: 97%

“…But in comparison with other catalysts, these hierarchical MFI/MCM-41 composites showed lower catalytic performance because of the larger particle size. [144] Thus there is a scope to prepare materials having hierarchial structure with reduced particle size.…”

Section: Heterogeneous Solid Acid-catalyzed Reactionsmentioning

confidence: 99%

Claisen‐Schmidt Condensation using Green Catalytic Processes: A Critical Review

Yadav

Wagh

2020

ChemistrySelect

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The success of dual‐functional templating for synthesizing hierarchical analcime zeolite

Wang

Tian

He³

et al. 2019

Applied Organom Chemis

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Novel and innovative hierarchical analcime zeolites were prepared by adding a gemini surfactant which acted as a dual‐functional template. Through a one‐step hydrothermal process, a hierarchical analcime zeolite with abundant intracrystalline mesopores was synthesized. Powder X‐ray diffraction and N2 adsorption–desorption data show that the mesoporous composites possess both a quite a number of mesopores and analcime structure. The results suggest that the dual‐functional template can be effective in the synthesis of hierarchical analcime zeolites.

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Direct synthesis of hierarchical zeolites through mesoporous 3D wormhole framework using single-head quaternary ammonium salt as structure-directing agent

Ding

Zhang

et al. 2021

J Mater Sci

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n-C22H45N+(CH3)2CH2(CH2)4CH2N(CH3)2Br−: A new effective one-step structure directing agent to synthesize hierarchical MFI zeolite with ordered hexagonal mesopores

Cited by 11 publications

References 23 publications

Claisen‐Schmidt Condensation using Green Catalytic Processes: A Critical Review

Claisen‐Schmidt Condensation using Green Catalytic Processes: A Critical Review

The success of dual‐functional templating for synthesizing hierarchical analcime zeolite

Direct synthesis of hierarchical zeolites through mesoporous 3D wormhole framework using single-head quaternary ammonium salt as structure-directing agent

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