Determination of Protonation Constants and Stability Constants of Lanthanides with Derivative of H4DOTA Complexes by the UV-VIS Spectrophotometry and Potentiometry

Evaluation of Stoichiometry, Stability Constants and Gibbs Free Energies of Acetaminophen-Zn (II) complex at Different Temperatures

“…Similar labile aquo complexes were also reported by Tirmizi and coworkers in their study of famotidine-Cu complex and cimetidine-Ni complex. (Reková, et al, 2009;Tirmizi, et al, 2008;Tirmizi, et al, 2012). Tella and co-workers reported labile aquo complex in their study of Dapsone-Cu(II) stability constants (Tella and Obaleye, 2009).…”

“…This corresponded to metal:ligand ratio of 1:1. Several authors have also applied continuous variation method in the determination of metal:ligand ratio in complexes (Reková, et al, 2009;Tirmizi, et al, 2008;Tirmizi, et al, 2012). The vol.…”

“…This corresponded to metal:ligand ratio of 1:1. Mole ratio method is an established technique in the determination of stoichiometry of metal complexes (Reková, et al, 2009;Tirmizi, et al, 2008;Tirmizi, et al, 2012). The results of stability constant suggested that acetaminophen could be effective in chelation therapy against Zn(II) toxicity.…”

“…Biological friendly complexing agents have been used effectively to chelate metals in patients with metal overload (Tella and Obaleye, 2010). Many authors have reported the study of stability constant of drug-metal complexes (Reková, et al, 2009;Tirmizi, et al, 2008;Tirmizi, et al, 2012). However, to the best of authors' knowledge, stoichiometry mole fraction, stability constants and Gibbs free energies of acetaminophen -Zn (II) complex at different temperatures have yet not appeared in the literature.…”

Application of central composite design and rank annihilation factor analysis for optimization of mixed chelate of UO2 2+ complex with ammonium-N,N-tetramethylenedithiocarbamate and estimation of Kf value

“…Due to the crucial phenomenon, the stability constants, which are the main key to understand the chelation reactions, of uranium-ligands have been widely subjected to study by different researchers [15]. Various techniques have been employed for determination of stability constants of metal and ligand complexes, generally named potentiometric titration, conductometry, voltametry, capillary electrophoresis, capillary isotachophoresis and spectrometric [16][17][18]. Spectrophotometry is a convenient and widely used technique for qualitative and quantitative analysis since the common availability of the instrumentation, the simplicity of procedures, and precision.…”