1414962-47-2Relevant academic research and scientific papers
Thermal, dielectrical properties and conduction mechanism of Cu(II) complexes of azo rhodanine derivatives
El-Ghamaz,El-Sonbati,Diab,El-Bindary,Morgan, Sh.M.
, p. 293 - 301 (2015)
A novel series of Cu(II) complexes of azo rhodanine derivatives [CuLn(OAc)(OH2)]2H2O (n = 1, R = OCH3; n = 2, CH3; n = 3, H; and n = 4, NO2) have been synthesized. The alternating current conductivity (σac) and dielectric properties of Cu(II) complexes of azo rhodanine derivatives were investigated in the frequency range 0.1-100 kHz and temperature range 303-600 K. The values of the thermal activation energies of electrical conductivity ΔE1 and ΔE2 for all Cu(II) complexes [CuLn(OAc)(OH2)]2H2O were calculated at different frequencies. The conductivity depends on the substituents of the complexes. The correlated barrier hopping (CBH) is the dominant conduction mechanism for complexes [CuLn(OAc)(OH2)]2H2O (n = 1, 2 and 4) while for complex [CuL3(OAc)(OH2)]2H2O the small polarons tunneling (SPT) is the dominant conduction mechanism.
Molecular docking, potentiometric and thermodynamic studies of azo rhodanines
El-Sonbati,El-Deen,El-Bindary
, p. 51 - 60 (2016)
Molecular docking was used to predict the binding between azo rhodanine derivatives (HLn) with the receptor prostate cancer 2Q7K hormone. The values of dissociation constant (pKH) of azo rhodanine derivatives (HLn) are correlated with Hammett's constant (σR). The proton-ligand dissociation constant of azo rhodanine derivatives (HLn) and metal-ligand stability constants of their complexes with metal ions (Mn2+, Co2+, Ni2+ and Cu2+) have been determined potentiometrically in 0.1 M KCl and 40% (by volume) ethanol-water mixture and at 298, 308 and 318 K. The stability constants of the formed complexes increase with the order Mn2+ 2+ 2+ 2+. The effect of temperature was studied and the corresponding thermodynamic parameters (ΔG, ΔH and ΔS) were derived and discussed. The dissociation process of the ligands is non-spontaneous, endothermic and entropically unfavorable. The formation of the metal complexes has been found to be spontaneous, endothermic and entropically favorable.
