Proton transfer from cyanocarbon acids. I. General base catalyzed detritiation of 1,4-dicyano-2-butene-1-t in aqueous solution

1969 ◽  
Vol 91 (14) ◽  
pp. 3733-3739 ◽  
Author(s):  
Edward A. Walters ◽  
Franklin A. Long
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
General Base

scholarly journals Base-enhanced catalytic water oxidation by a carboxylate–bipyridine Ru(II) complex

2015 ◽  
Vol 112 (16) ◽  
pp. 4935-4940 ◽  
Author(s):  
Na Song ◽  
Javier J. Concepcion ◽  
Robert A. Binstead ◽  
Jennifer A. Rudd ◽  
Aaron K. Vannucci ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Water Oxidation ◽  
Proton Acceptor ◽  
Half Time ◽  
X Ray ◽  
X Ray Crystallography ◽  
Buffer Base ◽  
Electron Proton Transfer ◽  
C Nmr

In aqueous solution above pH 2.4 with 4% (vol/vol) CH3CN, the complex [RuII(bda)(isoq)2] (bda is 2,2′-bipyridine-6,6′-dicarboxylate; isoq is isoquinoline) exists as the open-arm chelate, [RuII(CO2-bpy-CO2−)(isoq)2(NCCH3)], as shown by 1H and 13C-NMR, X-ray crystallography, and pH titrations. Rates of water oxidation with the open-arm chelate are remarkably enhanced by added proton acceptor bases, as measured by cyclic voltammetry (CV). In 1.0 M PO43–, the calculated half-time for water oxidation is ∼7 μs. The key to the rate accelerations with added bases is direct involvement of the buffer base in either atom–proton transfer (APT) or concerted electron–proton transfer (EPT) pathways.

Micellar catalysis of organic reactions. VIII. Kinetic studies of the hydrolysis of 2-acetyloxybenzoic acid (aspirin) in the presence of micelles

1982 ◽  
Vol 35 (7) ◽  
pp. 1357 ◽  
Author(s):  
TJ Broxton
Keyword(s):  
Aqueous Solution ◽  
Cetyltrimethylammonium Bromide ◽  
Cetylpyridinium Chloride ◽  
Kinetic Studies ◽  
Base Catalysis ◽  
Plateau Region ◽  
General Base ◽  
Mechanism Of Hydrolysis ◽  
Ph Range ◽  
Hydrolysis Of

The hydrolysis of 2-acetyloxybenzoic acid in the pH range 6-12 has been studied in the presence of micelles of cetyltrimethylammonium bromide (ctab) and cetylpyridinium chloride (cpc). In the plateau region (pH 6-8) the hydrolysis is inhibited by the presence of micelles, while in the region where the normal BAC2 hydrolysis (pH > 9) occurs the reaction is catalysed by micelles of ctab and cpc. The mechanism of hydrolysis in the plateau region is shown to involve general base catalysis by the adjacent ionized carboxy group both in the presence and absence of micelles. This reaction is inhibited in the presence of micelles because the substrate molecules are solubilized into the micelle and water is less available in this environment than in normal aqueous solution.

A water soluble ESIPT-based fluorescent chemodosimeter for the ratiometric detection of palladium ions in aqueous solution and its application in live-cell imaging

2018 ◽  
Vol 42 (19) ◽  
pp. 15587-15592 ◽  
Author(s):  
Jing Huang ◽  
Yu Ding ◽  
Hongyu Fu ◽  
Bo Chen ◽  
Yifeng Han
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Proton Transfer ◽  
Live Cell Imaging ◽  
Cell Imaging ◽  
Intramolecular Proton Transfer ◽  
Live Cell ◽  
Water Soluble ◽  
Ratiometric Detection ◽  
Fluorescent Chemodosimeter

A new Excited State Intramolecular Proton Transfer (ESIPT) based water-soluble fluorescent chemodosimeter for the ratiometric detection of palladium ions has been rationally designed and developed.

scholarly journals Aqueous Solution Effects on the Proton-Transfer Processes of GC and AT Base Pairs

2014 ◽  
Vol 30 (2) ◽  
pp. 257-264
Author(s):  
WU Ying-Xi ◽  
◽  
WANG Hong-Yan ◽  
LIN Yue-Xia
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Base Pairs ◽  
Transfer Processes

scholarly journals Proton Transfer Reactions of Triazol-3-ylidenes: Kinetic Acidities and Carbon Acid pKa Values for Twenty Triazolium Salts in Aqueous Solution

2012 ◽  
Vol 134 (50) ◽  
pp. 20421-20432 ◽  
Author(s):  
Richard S. Massey ◽  
Christopher J. Collett ◽  
Anita G. Lindsay ◽  
Andrew D. Smith ◽  
AnnMarie C. O’Donoghue
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Transfer Reactions ◽  
Pka Values ◽  
Proton Transfer Reactions ◽  
Carbon Acid ◽  
Triazolium Salts
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