Metallosurfactants of Chromium(III) Coordination Complexes. Synthesis, Characterization and Determination of CMC Values

Abstract

A number of mixed ligand chromium(III)-surfactant coordination complexes, of the type cis-[Cr(en) 2 (A)X] 2+ and cis-a-[Cr(trien)(A)X] 2+ (A = Dodecyl or Cetylamine; X = F ) , Cl ) , Br ) ) were synthesized from the corresponding dihalogeno complexes by ligand substitution. These compounds form foam in aqueous solution when shaken. The critical micelle concentration (CMC) values of these surfactant metal complexes in aqueous solution were obtained from conductance measurements. Specific conductivity data (at 303, 308 and 313 K) served for evaluation of the temperature-dependent critical micelle concentration (cmc) and the thermodynamics of micellization (DG 0 m , DH 0 m and DS 0 m ).

Antimicrobial Activity, Spectral Studies and Micellar Properties of Some Surfactant-Cobalt(III) Complexes

“…In these derivatives a small difference in the head group structure have a large effects on the CMC values and also CMC values decreased to approximately two times for every additional methylene residue in the hydrophobic group. As mentioned in our previous reports [44][45][46] , the CMC values (Table 2) for surfactant-S163 cobalt(III) complexes in the present study are also very low compared to that of the simple organic surfactants. Thus it is suggested that these metal surfactant complexes have more capacity to associate themselves forming aggregates compared to those of ordinary synthetic organic surfactants.…”

“…The surfactant-cobalt(III) complexes of the present study were prepared as given below using a method similar to the same type of complexes reported in the literature as well as in our previous work 8,30 .…”

“…Cobalt(III) complexes, by virtue of their abundance and diversity, have played a fundamental role in our understanding of the structural, spectroscopic and electrochemical properties of coordination compounds. We have been interested in the synthesis and micelle forming properties of cobalt(III) complexes containing lipophilic ligands for a long time [28][29][30] . As in biology, such compounds may exhibit novel physical and chemical properties with interesting and useful associated applications.…”

Thermodynamics and micellar properties of some surface active cobalt(III) metallosurfactants in nonaqueous medium

“…Cationic surfactants are the most widely used class of surfactants in both industrial practice and academic research, being utilized in practical applications ranging from household uses, including detergents, pharmaceuticals, and personal care products, to industrial applications involving coatings and lubricants 2. In previous papers 3–6, we have reported the influence of temperature on the behavior of some novel Co(III) and Cr(III) metallosurfactants in aqueous and nonaqueous solution.…”

Kinetics and Thermodynamics of Formation and Electron‐Transfer Reactions of Surfactant Cobalt(III) Complexes Containing Polypyridyl Ligands with Fe(CN)64−in Microheterogeneous Environment

“…Micelle‐forming properties and electron‐transfer reactions of many surfactant metal complexes of similar nature to ordinary systems have been studied in our laboratories for a long time . In all these surfactant–metal complexes, the coordination complex containing a central metal ion with surrounding ligands coordinated to metal acts as a surfactant.…”