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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 6
BKCSDE 11(6)
June 20, 1990 

Luminescence Quenching of Tris(2,2'-bipyridine) Ruthenium(Ⅱ) Complex by Viologens in Anionic Micellar and Polyelectrolyte Solutions : Variation with Alkyl Chain of Viologens
Joon Woo Park*, Mi Yeon Suk, Byung-Tae Ahn
Luminescence quenching reactions of photoexcited tris(2,2'-bipyridine)ruthenium (Ⅱ) complex cation, Ru(bpy)32+, 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)32+ and viologens to the microparticles, and the structures of the viologen-colloid complexes.
552 - 557
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