Kinetics of J-aggregation of a thiacarbocyanine dye in aqueous solution: Novel aggregate mediated by alcohols and metal ions

Illustration of a conversion from the dimer in the presence of 3 mM Mn 2+ and 1 vol% acetonitrile: Kinetics of J-aggregation. The kinetics of formation of J-aggregates induced by mono-, di- and trivalent metal ions was studied for 3,3′-di(γ-sulfopropyl)-5-methoxy-4′,5′-benzo-9-ethylthiacarbocyanine...

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Bibliographic Details
Published in:Chemical physics letters 2006-06, Vol.424 (4), p.307-311
Main Authors: Chibisov, Alexander K., Slavnova, Tatyana D., Görner, Helmut
Format: Article
Language:English
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Summary:Illustration of a conversion from the dimer in the presence of 3 mM Mn 2+ and 1 vol% acetonitrile: Kinetics of J-aggregation. The kinetics of formation of J-aggregates induced by mono-, di- and trivalent metal ions was studied for 3,3′-di(γ-sulfopropyl)-5-methoxy-4′,5′-benzo-9-ethylthiacarbocyanine in aqueous solution in the presence of organic solvents, e.g., acetonitrile, where the rate is strongly decreased. A novel intermediate aggregate (I-aggregate) was observed, when a metal ion was added to the thiacarbocyanine dye in a mixture of water with alcohols. The I- and J-aggregates are formed from the dimers. The kinetics of formation of the I-aggregate depend on the concentrations of alcohol and metal ions and its decay matches the formation of the modified J-aggregate.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2006.04.075