Shift of emission band upon excitation a
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K. Itoh; T. Azumi
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Article
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1973
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Elsevier Science
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English
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## Fluorescence and phosphorescence of quinine and its related compounds are found to exhibit a red-shift upon excitation at the long wavelength'edpe of the first absorption band, and this anomaly is investigated in detail. A mechanism which satisfactorily accounts for the experimental findings is