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KMID : 1059519840280060355
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Journal of the Korean Chemical Society
1984 Volume.28 No. 6 p.355 ~ p.360
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Absorption Spectra of a Methylene blue-Tetraphenylborate Ion Pai
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Song Hyung-Soo
Park Young-Joon
Kim Kang-Jin
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Abstract
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A new absorption spectrum observed from dilute aqueous solutions of methylene blue(MB+) and tetraphenylborate(TPB-) ions was investigated by spectrophotometry. The species responsible for the spectrum can be a charge-transfer complex formed between the two, univalent, and poorly hydrated ions in order to minimize the disturbance to the water structure. However, as the absorption band of MB+ is split into two bands with exciton splitting of about 2,000 cm-1, the formation of double ion-pair, (MB-TPB)2 appears to be more favorable than the charge transfer complex.
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