Photo-Induced Reduction Reaction of Methylene Blue in an Ionic Liquid

Jun-ichi Kadokawa, Hironori Izawa, Tomoya Ohta, Satoshi Wakizono, Kazuya Yamamoto

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DOI: 10.4236/ijoc.2011.14023                

Abstract

Reduction of methylene blue (MB) occurred by photo irradiation at 280 - 370 nm wavelengths to a solution of MB in an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), which was confirmed by color change and UV-Vis measurement of the solution. Furthermore, the reduced MB was oxidized again by standing the solution under the conditions of light shielding at 50?C. The fluorescence spectra of the solution excited at 350 nm suggested that the photo-induced reduction probably took place via electron-transfer from BMIMCl to MB.

Keywords

Methylene Blue, Ionic Liquid, Reduction, Photo Irradiation

Conflicts of Interest

The authors declare no conflicts of interest.

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