ESR Study on Fluorescein Semiquinone Radical
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概要
- 論文の詳細を見る
The ESR spectrum of the fluorescein semiquinone radical (dianion form) produced by illumination of an alkaline aqueous solution of uranine and leuco-uranine at pH between 11 and 14 was observed and its hfs constants were determined by comparing the spectrum with those of the mono- and trianion forms of fluorescein semiquinone and those of eosm semiquinone reported by Leaver. Six protons in the xanthene ring were found to be comprised of three pairs of magnetically equivalent protons, which suggests a certain dynamic mechanism to average the coupling constants. From a temperature dependence of the line width, protonation to the –O<SUP>−</SUP> group followed by deprotonation from the –OH group was proposed as a plausible mechanism.
- 公益社団法人 日本化学会の論文
著者
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Sato Yoshiharu
Department Of Anesthesia And Intensive Care Akita University School Of Medicine
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Niizuma Shigeya
Department of Chemistry Faculty of Science Tohoku University
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Konishi Shiro
Department of Chemistry, Faculty of Science, Tohoku University
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Kokubun Hiroshi
Department of Chemistry, Faculty of Science, Tohoku University
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