Micellar Binding of α-Diimine–Chromium(III) Complexes (Cr(NN)3+3) to Sodium Dodecyl Sulfate (SDS)

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

“…2 shows the luminescence spectrum of CrðphenÞ 3þ 3 in the absence and presence of TX-100; in the latter case, the spectrum has the same appearance as that found in water, but with less intensity and no maximum shift. This behavior was observed for all the Cr(III) complexes studied and was also observed previously for the interaction of the CrðNNÞ 3þ 3 complexes with SDS [19]. Gsponer et al studied the interaction of RuðbpyÞ 2þ 3 in SDS micelles under the same experimental conditions as in the present work.…”

“…The CrðNNÞ 3þ 3 (NN represents the following: 2,2 0 -bipyridine (bpy); 1,10-phenanthroline (phen); 5-chlorophenanthroline (5Clphen); 3,4,7,8-tetramethylphenanthroline (Me 4 phen); 4,7-dimethylphenanthroline (Me 2 phen); 4,7-diphenylphenanthroline (Ph 2 phen) were obtained from previous works and synthesized according to the literature [19,[25][26][27]. Fig.…”

“…It is also known that the addition of a surfactant to an aqueous solution changes the luminescent intensity and lifetime of many RuðNNÞ 2þ 3 and CrðNNÞ 3þ 3 complexes [19,10,21]. For the RuðNNÞ 2þ 3 surfactant complex system, Snyder et al [10] developed a model that describes interactions with cationic, anionic, and non-ionic surfactants and was successfully employed with CrðNNÞ 3þ 3 complexes in anionic micelles [19].…”

“…For the RuðNNÞ 2þ 3 surfactant complex system, Snyder et al [10] developed a model that describes interactions with cationic, anionic, and non-ionic surfactants and was successfully employed with CrðNNÞ 3þ 3 complexes in anionic micelles [19]. It was observed that, in general, both electrostatic and hydrophobic interactions are present in the binding of the probe to the anionic micelles due to the charge of the complex and the hydrophobicity of the ligands, respectively.…”

“…Moreover, the photochemistry and photophysics of a-diimine-chromium(III) ðCrðNNÞ 3þ 3 Þ complexes have been extensively studied in homogeneous systems [14,18], whereas there are, to the best of our knowledge, only a few works in micellar systems. One of them investigated the interaction of CrðNNÞ 3þ 3 complexes to SDS micelles and gave an important foundation for further studies which have shown that the CrðNNÞ 3þ 3 can be used as luminescent probes for determination of the association parameters of phenols to anionic micelles [19,20]. Furthermore, non-ionic surfactants ensure that the location of the probes within the micelles is not affected by electrostatic attractions.…”