Ternary Complexes in Solution. Comparison of the Coordination Tendency of Some Biologically Important Zwitterionic Buffers toward the Binary Complexes of Some Transition Metal Ions and Some Amino Acids

1999 ◽  
Vol 44 (6) ◽  
pp. 1151-1157 ◽  
Author(s):  
Zeinab M. Anwar ◽  
Hassan A. Azab
Keyword(s):  
Amino Acids ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Ternary Complexes ◽  
Binary Complexes

Competition between Cd(II) and other divalent transition metal ions during complex formation with amino acids, peptides, and chelating agents

2016 ◽  
Vol 327-328 ◽  
pp. 55-69 ◽  
Author(s):  
Maurizio Remelli ◽  
Valeria M. Nurchi ◽  
Joanna I. Lachowicz ◽  
Serenella Medici ◽  
M. Antonietta Zoroddu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Complex Formation ◽  
Transition Metal ◽  
Metal Ions ◽  
Chelating Agents ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document