scholarly journals Potentiometric studies on ternary complexes involving some divalent transition metal ions, gallic acid and biologically abundant aliphatic dicarboxylic acids in aqueous solutions

2015 ◽  
Vol 4 (2) ◽  
pp. 174-182 ◽  
Author(s):  
Abdelatty Mohamed Radalla
Keyword(s):  
Transition Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Gallic Acid ◽  
Dicarboxylic Acids ◽  
Transition Metal Ions ◽  
Ternary Complexes ◽  
Potentiometric Studies ◽  
Aliphatic Dicarboxylic Acids

Quenching of the tris(ethylenediamine)chromium(III) phosphorescence by some transition metal ions in aqueous solutions

1973 ◽  
Vol 77 (22) ◽  
pp. 2614-2617 ◽  
Author(s):  
H. F. Wasgestian ◽  
R. Ballardini ◽  
G. Varani ◽  
L. Moggi ◽  
V. Balzani
Keyword(s):  
Transition Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Transition Metal Ions

scholarly journals Mixed Ligand Complexes of Transition Metal Ions with Selective Bio-Ligands in Surfactant-Water Mixtures

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3182-3190
Keyword(s):  
Hydrogen Bonding ◽  
Transition Metal ◽  
Metal Ions ◽  
Chemical Speciation ◽  
Transition Metal Ions ◽  
Ternary Complexes ◽  
Mixed Ligand ◽  
Stacking Interactions ◽  
Micellar Media ◽  
Chelate Effect

Chemical speciation of ternary complexes of L-arginine and L-aspartic acid with essential transition metal ions was studied pH metrically. The following MLX, MLXH and ML2X ternary species are detected and reported in this paper. The existence of different ternary species is established from modeling studies using the computer program MINIQUAD75. The relative concentrations (M: L: X=1:2:2, 1:2:4, 1:4:2) and stabilities of the ternary species are compared with those of binary species. The extra stability associated with the ternary complexes is attributed to factors such as charge neutralization, chelate effect, stacking interactions and hydrogen bonding. Trend in variation of stability constants with the change in the mole fraction of the surfactant in various micellar media is explained on the basis of electrostatic and non-electrostatic forces. Distribution diagrams in relation to pH and plausible structures were presented.

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