Filtry
Acidity of MCM-58 and MCM-68 zeolites in comparison with some other 12-ring zeolites
was tocharacterize the accessibility and acid strength of Lewis and Bronsted sites using FTIR spectroscopy. Pyridine adsorption allowed for quantification of Bronsted and Lewis acid acidic
CF - Fyzikální chemie a teoretická chemie
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Identification of the most active sites for tetrahydropyranylation in zeolites: MFI as a test case
with both Bronsted and Lewis acid-based catalysts, such as zeolites, considered. However and computational data clearly show that Bronsted acid sites are more reactive than Lewis acid si...
Physical chemistry
- 2020 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
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Enantioselective Allylation of Selected ortho-Substituted Benzaldehydes: A Comparative Study
We report a systematic study of the allylation of ortho-substituted benzaldehydes under catalysis of a Lewis base (N, N-dioxide), a Lewis acid (Keck allylation), and a Bronsted acid. ortho-Halobenzaldehyde...
CC - Organická chemie
- 2014 •
- Jx •
- Odkaz
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Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports
matrices with Bronsted (RP-OH) and Lewis (tetracoordinated Al) acid functional groupsNon-hydrolytic sol-gel reactions of silicon acetates with trimethylsilyl (TMS) esters of phosphoric and phosphonic acids produce...
CA - Anorganická chemie
- 2016 •
- Jx •
- Odkaz
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Analysis of decisive structural parameters of zeolites for alkylation of benzene with ethylene
. The activity is controlled by the concentration of Bronsted acidic sites, while Lewis sitesThe effects of the zeolite structure and the Bronsted and Lewis sites by-products. It is shown that a three-dime...
Physical chemistry
- 2020 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
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Lewis Superacidic Tellurenyl Cation-Induced Electrophilic Activation of an Inert Carborane
The aryltellurenyl cation [2-(tBuNCH)C6H4Te](+), a Lewis super acid, and the weakly coordinating carborane anion [CB11H12](-), an extremely weak Bronsted acid (pK(a)=131.0 in MeCN), form an isolable ion pair comple...
Inorganic and nuclear chemistry
- 2021 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
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Enantioselective Allylation of beta-Haloacrylaldehydes: Formal Total Syntheses of Pteroenone and Antillatoxin
A comparative study of the catalytic allylations and crotylations of (E)-and (Z)-haloacrylaldehydes by Lewis bases (chiral N,N'-dioxides) and Bronsted acids (chiral phosphoric acids) was undertaken. The reactions p...
CC - Organická chemie
- 2016 •
- Jx •
- Odkaz
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Highly Functionalized Bronsted Acidic/Lewis Basic Hybrid Ferrocene Ligands: Synthesis and Coordination Chemistry
phosphanylcarboxylic acids and their corresponding aldehydes. These hybrid ambiphilic species that combine Bronsted-acidic and Lewis-basic functional moieties in their structure were......
Inorganic and nuclear chemistry
- 2019 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
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Alkaline Modification of MCM-22 to a 3D Interconnected Pore System and its Application in Toluene Disproportionation and Alkylation
of boththe Lewis and Bronsted acid site concentration., the accessibility/availability of Lewis acid sites, investigated by d (3)-acetonitrile treatments, while the Bronsted acidity decr...
CF - Fyzikální chemie a teoretická chemie
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Effect of Alkali-Free Synthesis and Post-Synthetic Treatment on Acid Sites in Beta Zeolites
and related Bronsted and Lewis acid sites. While calcination in ammonia preserves all of Bronsted acid sites and a decrease of the total concentration of Lewis sites suggested as a precursor of f...
Physical chemistry
- 2020 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
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