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Estimation of quantum yields of weak fluorescence from eosin Y dimers formed in aqueous solutions

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Abstract

We studied the weak fluorescence from the dimer of eosin Y (EY) in aqueous solutions. We used a newly developed ultrathin optical cell with a thickness ranging from of the order of microns to several hundreds of microns to successfully measure the fluorescence spectra of highly concentrated aqueous solutions of EY without artifacts caused by the reabsorption of fluorescence. The spectra we obtained were similar to the fluorescence spectrum of the EY monomer; almost no fluorescence was observed from the EY dimer. By a careful comparison of the spectra of solutions at low and high concentrations of EY, we succeeded in extracting the fluorescence spectrum of the EY dimer. The fluorescence quantum yield of the EY dimer was estimated to be 0.005.

Graphical abstract: Estimation of quantum yields of weak fluorescence from eosin Y dimers formed in aqueous solutions

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Publication details

The article was received on 28 Dec 2017, accepted on 21 Apr 2018 and first published on 25 Apr 2018


Article type: Paper
DOI: 10.1039/C7PP00465F
Citation: Photochem. Photobiol. Sci., 2018, Advance Article
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    Estimation of quantum yields of weak fluorescence from eosin Y dimers formed in aqueous solutions

    M. Enoki and R. Katoh, Photochem. Photobiol. Sci., 2018, Advance Article , DOI: 10.1039/C7PP00465F

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