Results 11 to 20 of about 3,261,533 (299)

Acidity of edge surface sites of montmorillonite and kaolinite [PDF]

, 2013
Peer ...
Cheng, Jun, Liu, Xiandong, Lu, Xiancai, Meijer, Evert Jan, Sprik, Michiel, Wang, Rucheng   +5 more
core   +1 more source

Computing surface acidity constants of proton hopping groups from density functional theory based molecular dynamics: application to SnO2(110)/H2O interface.

Journal of Chemical Theory and Computation, 2020
Proton transfer at metal oxide/water interfaces plays an important role in electrochemistry, geochemistry and environmental science. The key thermodynamic quantity to characterize this process is the surface acidity constant.
Mei Jia, Chao Zhang, S. Cox, M. Sprik, Jun Cheng   +4 more
semanticscholar   +1 more source

Protolytic equlibria of bromazepam [PDF]

Journal of the Serbian Chemical Society, 2002
The protolytic equilibria of bromazepam, an ampholyte sparingly soluble in water, in homogeneous and heterogeneous systems were studied in the pH range 0–14 at 25ºC and at ionic strength of 0.1 mol/dm3 (NaCl).
Pfendt Lidija B., Popović Gordana V., Damjanović Tatjana Ž., Sladić Dušan M.   +3 more
doaj   +1 more source

Aromatic nitrations by mixed acid. Slow liquid-liquid reaction regime [PDF]

, 1995
Aromatic nitrations by mixed acid have been selected as a specific case of a heterogeneous liquid-liquid reaction. An extensive experimental programme has been followed using adiabatic and heat-flow calorimetry and pilot reactor experiments, supported by
Alos, M.A., Hernandez sanchez, F., Hernandez, H., Molga, E.J., Westerterp, K.R., Zaldivar, J.M., Zaldivar, J.M.   +6 more
core   +3 more sources

Uso de redes neurais recorrentes na determinação das constantes de acidez para a 7-epiclusianona em misturas etanol-água

Química Nova, 2012
This work propose a recursive neural network to solve inverse equilibrium problem. The acidity constants of 7-epiclusianone in ethanol-water binary mixtures were determined from multiwavelength spectrophotmetric data.
Éderson D' Martin Costa, Nelson Henrique Teixeira Lemes, Marcelo Henrique dos Santos, João Pedro Braga   +3 more
doaj   +1 more source

Protolytic equilibria in homogeneous and heterogeneous systems of ketoconazole and its direct spectrophotometric determination in tablets [PDF]

Journal of the Serbian Chemical Society, 2005
The acid-base equilibria of a diprotic, slightly hydrosoluble base ketoconazole were studied in homogeneous and heterogeneous water systems. The determinations were performed at 25 ºC at a constant ionic strength of 0.1M(NaCl).
MIRJANA P. VOJIC, GORDANA V. POPOVIC, DUSAN M. SLADIC, LIDIJA B. PFENDT   +3 more
doaj   +3 more sources

An LFER study of the protolytic equilibria of 4-aryl-2,4-dioxobutanoic acids in aqueous solutions [PDF]

Journal of the Serbian Chemical Society, 2007
The protolytic equilibria of 13 4-aryl-2,4-dioxobutanoic acids (ADKs) were spectrophotometrically studied in aqueous solutions in the pH range 1–9 at 25±1 °C and an ionic strength of 0.1 mol l-1 (NaCl), with the exception of the 4-OH- derivative which ...
TATJANA Z. VERBIC, BRANKO J. DRAKULIC, MIRE F. ZLOH, JOVANA R. PECELJ, GORDANA V. POPOVIC, IVAN O. JURANIC   +5 more
doaj   +3 more sources

Gas phase carbon acidity and correlations with aqueous pK~a~ values: A comparison of B3LYP/6-311++G(d,p), Gaussian-4 (G4), and experimental approaches [PDF]

, 2010
Gas phase standard state (298.15 K, 1 atm) calculations were conducted at the B3LYP/6-311++G(d,p) density functional and the Gaussian-4 (G4) composite method levels of theory to estimate the acidity of various carbon acids.
Kaya Forest, Sierra Rayne
core   +2 more sources

Impact of the redox state of flavin chromophores on the UV–vis spectra, redox and acidity constants and electron affinities

, 2020
Isoalloxazine is the core chromophore present in the cofactor of flavoproteins. Naturally, flavin usually exists in five different redox forms in protein milieu by accepting up to 2-electrons and 2-protons.
Padmabati Mondal, Karno Schwinn, Miquel Huix-rotllant   +2 more
semanticscholar   +1 more source

Lewis Acidic Boranes, Lewis Bases, and Equilibrium Constants: A Reliable Scaffold for a Quantitative Lewis Acidity/Basicity Scale

Chemistry, 2020
A quantitative Lewis acidity/basicity scale toward boron‐centered Lewis acids has been developed based on a set of 90 experimental equilibrium constants for the reactions of triarylboranes with various O‐, N‐, S‐, and P‐centered Lewis bases in ...
R. Mayer, N. Hampel, A. Ofial
semanticscholar   +1 more source