Interaction of α-diimine-chromium(III) complexes with non-ionic surfactant Triton X-100

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:392

Article

Bazan, Claudia M.¹  Pagliero, Daniela¹  Suarez, Alejandra²  Argueello, Gerardo A.¹ 

[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Quim Fis, INFIQC, RA-5000 Cordoba, Argentina

[2] Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, Inst Quim Organ Sintesis, IQUIOS, RA-2000 Rosario, Santa Fe, Argentina

关键词: Poly(oxyethylene)isooctylphenylether;    Sodium dodecylsulfate;    alpha-Diimine-chromium(III) complexes;    Titration curves;    Binding constants;    Aggregation number;    Premicellar aggregates;    Hydrophobic interactions;   

DOI  :  10.1016/j.jcis.2012.10.006

来源: Elsevier

【 摘 要 】

Using either luminescence intensity or lifetime measurements, we have studied the binding interactions of Cr(NN)(3)(3+) (NN = alpha-diimine ligands) with non-ionic solutions of surfactant p-(1,1,3,3-tetramethylbutyl)phenoxypoly(ethylene glycol), Triton X-100 (TX-100). The titration curves consisted of two curved regions with different slopes. This biphasic behavior of lifetime-TX-100 concentration data revealed the presence of premicellar aggregates at low TX-100 concentration and the formation of normal micelles at high surfactant concentration. The results were analyzed with a model that includes binding of Cr(NN)(3)(3+) (probe) to small premicellar aggregates and to micelles. There is a good correlation between the hydrophobicity of the ligands of Cr(III) complex and the strength of the binding of the complexes to the micelles. A comparison with the binding of Cr(NN)(3)(3+) to sodium dodecylsulfate (SDS) is discussed. (c) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

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