IQUIR   05412
INSTITUTO DE QUIMICA ROSARIO
Unidad Ejecutora - UE
artículos
Título:
Interaction of a-diimine–chromium(III) complexes with non-ionic surfactant Triton X-100
Autor/es:
BAZÁN, C. M.; PAGLIERO, D.; SUAREZ, A. G.; ARGÜELLO, GERARDO A.
Revista:
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 392 p. 266 - 273
ISSN:
0021-9797
Resumen:
Using either luminescence intensity or lifetime measurements, we have studied the binding interactions of CrðNNÞ3þ 3 (NN = a-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 CrðNNÞ3þ 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 CrðNNÞ3þ 3 to sodium dodecylsulfate (SDS) is discussed.