scholarly journals Increasing the Brønsted acidity of Ph2PO2H by the Lewis acid B(C6F5)3. Formation of an eight-membered boraphosphinate ring [Ph2POB(C6F5)2O]2

2016 ◽  
Vol 52 (73) ◽  
pp. 10992-10995 ◽  
Author(s):  
Ralf Kather ◽  
Elena Rychagova ◽  
Paula Sanz Camacho ◽  
Sharon E. Ashbrook ◽  
J. Derek Woollins ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Strong Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brønsted Acidity ◽  
Acid Ph ◽  
Brönsted Acidity ◽  
Brönsted Acid ◽  
Strong Lewis Acid

The strong acid (C6F5)3BOPPh2OH, was prepared in situ by the reaction of the rather weak Brønsted acid Ph2PO2H with the strong Lewis acid B(C6F5)3.

Selecting strong Brønsted acid zeolites through screening from a database of hypothetical frameworks

2017 ◽  
Vol 19 (22) ◽  
pp. 14702-14707 ◽  
Author(s):  
Taku Matsuoka ◽  
Laurent Baumes ◽  
Naonobu Katada ◽  
Abhijit Chatterjee ◽  
German Sastre
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brønsted Acidity ◽  
Brönsted Acidity ◽  
Brönsted Acid ◽  
Acid Zeolites

New candidate zeolites with potentially strong Brønsted acidity have been computationally selected from the Treacy/Foster database of prospective zeolites.

Transformation of LPG to Light Olefins on Composite HZSM-5/SAPO-5

2021 ◽  
Author(s):  
Kangzhou Wang ◽  
Jianli Zhang ◽  
Subing Fan ◽  
Xiaobo Peng ◽  
Noritatsu Tsubaki ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Strong Acid ◽  
Weak Acid ◽  
Zeolite Catalysts ◽  
Light Olefins ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Liquefied Petroleum Gas ◽  
Brönsted Acid

To selectively transform LPG (liquefied petroleum gas), composite HZSM-5/SAPO-5 zeolite catalysts were fabricated with adjustable Brønsted acid/Lewis acid (BA/LA) ratio and weak acid/strong acid (WA/SA) ratio. HZSM-5 powder (SiO2/Al2O3=100) and...

scholarly journals Measuring the Brønsted acid strength of zeolites – does it correlate with the O–H frequency shift probed by a weak base?

2014 ◽  
Vol 16 (21) ◽  
pp. 10129-10141 ◽  
Author(s):  
Carlos O. Arean ◽  
Montserrat R. Delgado ◽  
Petr Nachtigall ◽  
Ho Viet Thang ◽  
Miroslav Rubeš ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Acid Strength ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Weak Base ◽  
Brønsted Acidity ◽  
Brönsted Acidity ◽  
Brönsted Acid ◽  
And Calorimetry

ΔνOH (see the figure) can be a misleading indicator of zeolite Brønsted acidity, as shown by VTIR spectroscopy and calorimetry.

scholarly journals Tailoring Lewis/Brønsted acid properties of MOF nodes via hydrothermal and solvothermal synthesis: simple approach with exceptional catalytic implications

2021 ◽  
Author(s):  
Sergio Rojas-Buzo ◽  
Benjamin Bohigues ◽  
Christian W. Lopes ◽  
Débora M. Meira ◽  
Mercedes Boronat ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Active Site ◽  
Solvothermal Synthesis ◽  
Simple Approach ◽  
Organic Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Properties ◽  
Brönsted Acid

The Brønsted/Lewis acid properties of Hf-MOF-808 can be tuned by simply controlling the solvent employed in its synthesis, with direct catalytic implications on the activity and selectivity of organic reactions sensitive to the active site nature.

Study on the removal and depolymerization of lignin from corn stover through the synergistic effect of Brønsted acid, Lewis acid and hydrogenation sites

Fuel ◽  
2021 ◽  
Vol 305 ◽  
pp. 121509
Author(s):  
Baikai Zhang ◽  
Wenzhi Li ◽  
Tingwei Zhang ◽  
Xu Li ◽  
Ajibola T. Ogunbiyi ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Corn Stover ◽  
Lewis Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Critical role of Bronsted acid in Lewis-acid-catalyzed synthesis of Amadori and Heyns compounds of β-amino acids

2021 ◽  
pp. 1-11
Author(s):  
Debasree Chanda ◽  
Gangothri M. Venkataswamy ◽  
Lagamawwa V. Hipparagi ◽  
Nanishankar V. Harohally
Keyword(s):  
Amino Acids ◽  
Lewis Acid ◽  
Critical Role ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed
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