Interaction of aqueous solutions of a surface active copper(II) complex with several common surfactants

Y. Y. Lim, K. H. Lim

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Micellar properties of binary mixed surfactants of a surface active mixed copper(II) chelate, [Cu(C12-tmed) (acac)Cl] (where C12-tmed is N,N,N'-trimethyl-N'-dodecylethylenediamine) with three common surfactants, viz. sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB), and octaethylene glycol monododecyl ether (C12E8), were investigated by surface tensiometry, ESR, and UV-visible absorption techniques. The surface tension data were treated with Rubingh's method for mixed micelle formation and Rosen's method for mixed monolayer formation at the aqueous solution/air interface. It was found that in the mixed micelle there is strong attractive interaction between cationic copper surfactant and anonic dodecyl sulfate while there is almost ideal mixing between copper surfactant and CTAB and C12E8. From the ESR and UV-visible studies, a mixed block-type arrangement of head groups is proposed.

Original languageEnglish
Pages (from-to)116-119
Number of pages4
JournalJournal of Colloid and Interface Science
Issue number1
Publication statusPublished - 1 Dec 1997
Externally publishedYes


  • Copper(II) mixed chelate complex
  • Mixed micelle and monolayer formation
  • Structure of mixed micelle

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