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Kinetic Study of the Reaction of Leuco Methylene Blue with 2,6-Dimethyl-p-benzoquinone in a Reverse Micellar System

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Abstract

The kinetics of the reaction of leuco methylene blue (MBH) with 2,6-dimethyl-p-benzoquinone (DMBQ) were studied in a heptane/bis(2-ethylhexyl)-sulfosuccinate (AOT)/water reverse micellar system. The pseudo-first-order rate constant (k obsd) obtained in the presence of excess of DMBQ was found to be proportional to the initial concentration of DMBQ for W 0=3, 5, 10, 15 and 20 (W 0=[H2O]/[AOT]). The second-order rate constant (k 2=k obsd/[DMBQ]0) increased with an increase in the W 0 value, but was almost independent of the concentration of the water pool. A mechanism involving the distribution of DMBQ between the reverse micellar interface and bulk organic solvent was proposed to explain these findings.

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Authors and Affiliations

  1. The Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Okayama, 700-8530, Japan

    Daisuke Usui, Yoshimi Sueishi & Shunzo Yamamoto

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  1. Daisuke Usui
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  2. Yoshimi Sueishi
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  3. Shunzo Yamamoto
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Correspondence to Shunzo Yamamoto.

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Usui, D., Sueishi, Y. & Yamamoto, S. Kinetic Study of the Reaction of Leuco Methylene Blue with 2,6-Dimethyl-p-benzoquinone in a Reverse Micellar System. J Solution Chem 37, 1005–1014 (2008). https://doi.org/10.1007/s10953-008-9284-0

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  • DOI: https://doi.org/10.1007/s10953-008-9284-0

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