Premicellar and micelle formation behavior of dye surfactant ion pairs in aqueous solutions: Deprotonation of dye in ion pair micelles

Stabilization of diketo tautomer of curcumin by premicellar anionic surfactants: UV–Visible, fluorescence, tensiometric and TD-DFT evidences

“…4). The absence of significant lowering of surface tension of the surfactants and absence of two CMCs in the presence of curcumin as reported earlier with other ionic dyes [26,[32][33][34][35] indicate that the curcumin-anionic surfactant complex does not behave like a nonionic surfactant but retains the anionic charge with comparable surface activity.…”

“…Assuming the interaction to be of 1:1 stoichiometry, the interaction can be represented as follows [26,[33][34][35]:…”

“…The type of interactions depends mostly on the chemical structure and nature of both of the interacting compounds [31]. Surface tensiometric studies showed that some ionic surfactants exhibit two distinct CMC's in the presence of some oppositely charged dyes where the dye-surfactant ion pairs behave like nonionic surfactants in the submicellar concentration range [32][33][34][35].…”

Specific interactions of anions and pre-micelles in the alkaline fading of crystal violet carbocation

“…Dye-surfactant interactions are now a days being widely investigated [20,23,24]. Since crystal violet exists as a carbocation it may be expected that there will be interaction between CV + and anionic surfactants.…”

Influence of Mixed Cationic-nonionic Surfactant Systems on the Spectral Properties of C.I. Mordant Blue 29 and Its Complexes with Iron(III)

“…[1][2][3][4][5][6][7][8] Studies of such interactions are fundamental in many chemical and pharmaceutical fields, in organic syntheses, and in several industrial applications.…”