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

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
Masami Enoki, Ryuzi Katoh

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.

References

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Jul 30, 2011·Chemical Society Reviews·Yuning HongBen Zhong Tang
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Citations

May 30, 2019·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Yuuya ShibasakiRyuzi Katoh
Nov 4, 2020·The Journal of Physical Chemistry. B·Alexander VallmitjanaEnrico Gratton

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