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Luminescence Quenching of Tris(2,2'-bipyridine) Ruthenium(II) Complex by Viologens in Anionic Micellar and Polyelectrolyte Solutions: Variation with Alkyl Chain of Viologens

  • Published : 1990.12.20

Abstract

Luminescence quenching reactions of photoexcited tris(2,2'-bipyridine)ruthenium (Ⅱ) complex cation, $Ru(bpy)_3\;^{2+}$, by dialkylviologens (dimethyl, dioctyl, dibenzyl, methyloctyl, methyldodecyl, and methylbenzyl) were studied in sodium dodecylsulfate (SDS), poly(styrenesulfonate) (PSS), and poly(vinylsulfonate) (PVS) solutions. The relative quenching rate varies widely with the microheterogeneous media employed: the highest quenching rate is observed for methyldodecylviologen in homogeneous aqueous medium, dibenzylviologen in SDS and PVS solutions, and dimethylviologen in PSS solution; the lowest rate is found for dimethylviologen in homogeneous medium and SDS solution, methyldodecylviologen in PSS and PVS solutions. These results were interpreted in terms of reduction potential of viologens, affinity of $Ru(bpy)_3\;^{2+}$ and viologens to the microparticles, and the structures of the viologen-colloid complexes.

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Cited by

  1. Bimolecular Electron Transfer Quenching of Neutral *Ru(phen)2bps by 4,4‘-Diheptyl Viologen in Water and Bound to SDS Micelles vol.102, pp.28, 1990, https://doi.org/10.1021/jp9814451
  2. Fluorescence quenching of carmoisine by viologens in neat methanol: Observation of inversion in quenching vol.507, pp.4, 1990, https://doi.org/10.1016/j.cplett.2011.03.054