Results 261 to 270 of about 3,274,216 (342)

Application of principal component–wavelet neural network in spectrophotometric determination of acidity constants of 4-(2-thiazolylazo)-resorcinol

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2011
Ali Benvidi, Mohammad Mazloum-Ardakani
exaly   +2 more sources

The Second Acidic Constant of Salicylic Acid

Annali di Chimica, 2005
AbstractThe second dissociation constant of salicylic acid (H2L) has been determined, at 25 °C, in NaCl ionic media by UV spectrophotometric measurements. The investigated ionic strength values were 0.16, 0.25, 0.50, 1.0, 2.0 and 3.0 M. The protolysis constants calculated at the different ionic strengths yielded, with the Specific Interaction Theory ...
PORTO R, DE TOMMASO G, FURIA, Emilia
openaire   +3 more sources

Determination of thermodynamic acidity constants and limiting ionic mobilities of weak electrolytes by capillary electrophoresis using a new free software AnglerFish

Electrophoresis, 2020
Thermodynamic acidity constants (acid or acid‐base dissociation constants, sometimes called also as ionization constants) and limiting ionic mobilities (both of them at defined temperature, usually 25°C) are the fundamental physicochemical ...
M. Malý, Milan Boublík, M. Pocrnić, M. Ansorge, Kateřina Lorinčíková, J. Svobodová, Vlastimil Hruška, P. Dubský, B. Gaš   +8 more
semanticscholar   +1 more source

Reduction Potentials and Acidity Constants of Mn Superoxide Dismutase Calculated by QM/MM Free‐Energy Methods

ChemPhysChem, 2011
Markus Kaukonen, Lubomír Rulíšek, Ulf Ryde   +2 more
exaly   +2 more sources

Determination of acidity constants

Chemical Reviews, 1974
exaly   +2 more sources

Acid Dissociation Constants of Phenylalkanolamines

Journal of Pharmaceutical Sciences, 1962
The acid dissociation constants of phenylephrine, synephrine, and tyramine were investigated by the new spectrophotometric method of Edsall. Epinephrine was studied by a titration and complexation method. It is concluded from analysis of the spectral data that the phenolic function is a stronger acid than the alkylammonium group.
S, RIEGELMAN, L A, STRAIT, E Z, FISCHER
openaire   +2 more sources

Dissociation constants of carboxymethyloxysuccinic acid

Talanta, 1974
The dissociation constants of carboxymethyloxysuccinic acid (CMOS) have been measured at 25 degrees and an ionic strength of 0.1M in sodium perchlorate. The values found were: pK(1) = 2.52, pK(2) = 3.77 and pK(3) = 5.00. CMOS is thus seen to be rather stronger than its isomer citric acid.
C E, Rodriguez, C D, Devine
openaire   +2 more sources

Acidity constant of formic acid

Transactions of the Faraday Society, 1966
The acidity constant of formic acid has been re-determined by precise e.m.f. measurements on cells without liquid junctions containing formic acid-sodium formate buffer solutions. The pKa is 3.739±0.001 at 25°C. This result agrees exactly with Saxton and Darken's value obtained by conductivity measurements but not with Harned and Embree's value ...
J. E. Prue, A. J. Read
openaire   +1 more source

Accelerating Computation of Acidity Constants and Redox Potentials for Aqueous Organic Redox Flow Batteries by Machine Learning Potential-Based Molecular Dynamics.

Journal of the American Chemical Society
Due to the increased concern about energy and environmental issues, significant attention has been paid to the development of large-scale energy storage devices to facilitate the utilization of clean energy sources. The redox flow battery (RFB) is one of
Feng Wang, Zebing Ma, Jun Cheng
semanticscholar   +1 more source

Data-Efficient Active Learning for Thermodynamic Integration: Acidity Constants of BiVO4 in Water.

ChemPhysChem
The protonation state of molecules and surfaces is pivotal in various disciplines, including (electro-)catalysis, geochemistry, biochemistry, and pharmaceutics.
Philipp Schienbein, Jochen Blumberger
semanticscholar   +1 more source