Physicochemical Determination Of Cmc And Thermodynamic Evolution: Metallomicelles Of Crii, Mnii, And Coii Complexes
Organometalic surfactants have been synthesised using the heterocyclic ligand 2-((3-methyl -5- oxo -1- phenyl-4,5-dihydro-1H-pyrazol-4-yl)(phenyl)methylene)hydrazine carbothioamide (PMBP-TSC) and transition metal ions (CrII, MnII, and CoII). The electrical conductivity at 15, 25, 35 and 45°C, as well as Uv-visible spectrophotomety at 25°C, were used to determine the critical micelle concentration (CMC), ionization degree (α), degree of counter ion binding (β), binding constant (Kb), and other physicochemical parameters of micellization. These parameters include the standard Gibb’s free energy change, ΔmG°, standard enthalpy change, ΔmH°, and standard entropy change, ΔmS°. Based on the negative ΔmG° micellization is thermodynamically posible and spontaneous. The estimate of the activation energy (Ea) was estimated using the Coats-Redfern method based on the examination of thermogravimetric analysis (TGA) and the kinetics of thermal degradation. According to the data, adding metal causes the CMC to decrease and the Ea to rise, proving that CrII has the best level of thermal stability.