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Induced Intersystem Crossing at the Fluorescence Quenching of Laser Dye 7-Amino-1,3-Naphthalenedisulfonic Acid by Paramagnetic Metal Ions

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Abstract

The fluorescence and triplet state quenching of 7-amino-1,3-naphthalenesulfonic acid by paramagnetic metal ions have been investigated in an aqueous medium. The basic mechanism of the fluorescence quenching involves the static and dynamic electron transfer to the paramagnetic cation. The induced S1→T1 intersystem crossing at fluorescence quenching of the fluorophore by Cu2+ cation has been found. There is a correlation between triplet state quenching rate constants and values of the efficient paramagnetic susceptibility and spin of the cations. The rate constants for the quenching pathways have been calculated.

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  1. Moscow State University, 119991, Moscow, Russia

    Valery V. Volchkov, Vladimir L. Ivanov & Boris M. Uzhinov

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  1. Valery V. Volchkov
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  2. Vladimir L. Ivanov
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  3. Boris M. Uzhinov
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Correspondence to Boris M. Uzhinov.

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Volchkov, V.V., Ivanov, V.L. & Uzhinov, B.M. Induced Intersystem Crossing at the Fluorescence Quenching of Laser Dye 7-Amino-1,3-Naphthalenedisulfonic Acid by Paramagnetic Metal Ions. J Fluoresc 20, 299–303 (2010). https://doi.org/10.1007/s10895-009-0555-y

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  • DOI: https://doi.org/10.1007/s10895-009-0555-y

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