Interactions of ruthenium(II) photosensitizers with Triton X-100

Abstract

Using excited-state lifetime measurements as a probe, we have studied the interactions between a series of ruthenium(II) photosensitizers and Triton X-100 surfactant. The complexes are weakly bound to the surfactant assemblies, and the presence of the photosensitizers influences the assembly process. There is a good correlation between the strength of the binding and the nature of the ligands on the metal complex.

Photoinduced Electron Transfer Reactions of Ruthenium(II) Phenanthroline Complexes with Dimethylaniline in Aqueous and Micellar Media

“…The strength of binding depends on the combination of electrostatic attractions or repulsions and hydrophobic effects [17][18][19][20][21][22]. Davies et al studied the effects of micellar solution on the electron transfer reaction between [Co(terpyr)] 2+ and a series of Co(III)-complexes in varying ligand structure and ionic charge redox reactions of amphiphilic cobalt complexes [23].…”

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

“…We have used a model developed by Demas et al [6], which was extensively developed by Snyder et al [10] to interpret our results. This model takes into account the interaction between the chromium complex (A) and both surfactant monomer (S) and micelle (M), described by the following equations: …”

“…The study of such systems has been a continuous interest area. In the literature, there are many works that report the interaction of a-diimine-ruthenium(II) ðRuðNNÞ 2þ 3 Þ complexes to different micellar media [5][6][7][8][9][10][11] as well as the influence of these interactions on the reactions with various compounds [12,13]. 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.…”

Effects of Nonionic Micelles on the Rate of Mononuclear Heterocyclic Rearrangement of (Z)-Phenylhydrazones of 5-Substituted 3-Benzoyl-1,2,4-oxadiazoles

“…The larger K S value of 1d than of 1b and 1c would suggest that, apart from the steric hindrance effect, other factors may have a certain role in the solubilization process of this substrate in the nonionic micellar aggregates studied. A possibility might arise from the favorable interactions (30) between the π-bonding aromatic region of the Triton X-100 micelles and the phenyl-substituted substrate, the alkyl derivatives lacking these π interactions.…”