Preferential solvation of hydrogen ions in mixed water-amine ion clusters

1984 ◽  
Vol 106 (8) ◽  
pp. 2306-2315 ◽  
Author(s):  
A. J. Stace
Keyword(s):  
Preferential Solvation ◽  
Hydrogen Ions ◽  
Ion Clusters ◽  
Mixed Water

scholarly journals A Gas-phase study of the preferential solvation of Mn2+ in mixed water/methanol clusters

2008 ◽  
Vol 19 (4) ◽  
pp. 520-530 ◽  
Author(s):  
Bridgette J. Duncombe ◽  
Jens O. S. Rydén ◽  
Ljilijana Puškar ◽  
Hazel Cox ◽  
Anthony J. Stace
Keyword(s):  
Gas Phase ◽  
Preferential Solvation ◽  
Phase Study ◽  
Mixed Water

ION CLUSTERS IN THE POSITIVE COLUMN OF He-Co AND Ar-Co DISCHARGES

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-31-C7-32
Author(s):  
Y. Kaufman ◽  
P. Avivi ◽  
F. Dothan
Keyword(s):  
Positive Column ◽  
Ion Clusters

Spectrophotometric study of the acid-base and optical properties of the 5-bromo and 5-chloro derivatives of 2-(2-pyridylazo)-5-(diethylamino)phenol (BrPADAP, ClPADAP) and their complexation equilibria with zinc(II) ions

1982 ◽  
Vol 47 (10) ◽  
pp. 2676-2691 ◽  
Author(s):  
Miroslav Macka ◽  
Vlastimil Kubáň
Keyword(s):  
Equilibrium Constants ◽  
Spectrophotometric Study ◽  
Graphical Analysis ◽  
Alkaline Media ◽  
Acid Base ◽  
Ethanol Medium ◽  
Triton X ◽  
Mixed Water ◽  
Derivatives Of

The optical and acid-base characteristics of BrPADAP and ClPADAP were studied in mixed water-ethanol and water-DMF media and in 10% ethanol medium in the presence of cationic, anionic and nonionic tensides. The composition, optical characteristics, molar absorption coefficients and equilibrium constants of the ML and ML2 complexes with zinc(II) ions were found by graphical analysis and numerical interpretation of the absorbance curves by the modified SQUAD-G program. Optimal conditions were found for the spectrophotometric determination of Zn(II) in the presence of 0.1% Triton X-100 or 1% Brij 35 in alkaline media with pH = 6.5-10. BrPADAP and ClPADAP are the most sensitive reagents (ε = 1.3-1.6 . 105 mmol-1 cm2 at 557 and 560 nm, respectively) for the determination of zinc with high colour contrast of the reaction (Δλ = 104 nm) and selectivity similar to that for the other N-heterocyclic azodyes (PAN, PAR, etc.).

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