Issue 10, 2000
From the journal:

Physical Chemistry Chemical Physics

Kinetic study on the reversible hydride transfer between methylene blue and thionine

Yingjin Liu,a   Shunzo Yamamoto,*a   Yoshimichi Fujiyamaa  and  Yoshimi Sueishia  

* Corresponding authors

a Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama, Japan

Abstract

The kinetics of the hydride transfer reaction between leuco methylene blue and thionine was investigated spectrophotometrically by means of the stopped-flow technique. Leuco methylene blue and leuco thionine were produced by photoreduction of methylene blue and thionine with triethylamine in ethanol in the drive syringe of the stopped-flow apparatus and their solutions were used as such in the measurement of the reaction rate. This reaction was found to be reversible, and the rate constants for forward and backward reactions were obtained. The ratio of kf/kb is consistent with the value of the equilibrium constant (K) which was obtained from the absorbance at 655 nm of methylene blue at equilibrium using the stoichiometric relationships and conservation conditions. The mechanism of this reversible hydride transfer reaction was discussed.

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Article information

DOI
https://doi.org/10.1039/B000046I
Article type
Paper
Submitted
05 Jan 2000
Accepted
13 Mar 2000
First published
01 Jun 2000

Phys. Chem. Chem. Phys., 2000,2, 2367-2371

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Kinetic study on the reversible hydride transfer between methylene blue and thionine

Y. Liu, S. Yamamoto, Y. Fujiyama and Y. Sueishi, Phys. Chem. Chem. Phys., 2000, 2, 2367 DOI: 10.1039/B000046I

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