Anthracene Fluorescence Quenching by a Tetrakis (Ketocarboxamide) Cavitand
Janosi, T. Z., Korppi-Tommola, J., Csok, Z., Kollar, L., Myllyperkiö, P., & Erostyak, J. (2014). Anthracene Fluorescence Quenching by a Tetrakis (Ketocarboxamide) Cavitand. Journal of spectroscopy, 2014, Article 708739. https://doi.org/10.1155/2014/708739
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Journal of spectroscopyDate
2014Copyright
© 2014 Tibor Zoltan Janosi et al. This is an open access article distributed under the Creative Commons Attribution 3.0. License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work in properly cited. The Creative Commons Public Domain Dedication waiver applies to the data made available in this article, unless otherwise stated.
Quenching of both fluorescence lifetime and fluorescence intensity of anthracene was investigated in the presence of a newly derived tetrakis (ketocarboxamide) cavitand at various concentrations. Time-correlated single photon counting method was applied for the
lifetime measurements. A clear correlation between the fluorescence lifetime of anthracene as a function of cavitand concentration in dimethylformamide solution was observed. The bimolecular collisional quenching constant was derived from the decrease of lifetime. Fluorescence intensity was measured in the emission wavelength region around 400 nm as a result of excitation at 280 nm. Effective quenching was observed in the presence of the cavitand. The obtained Stern-Volmer plot displayed upward curvature. The results did not follow even extended Stern-Volmer behavior, often used to describe deviations from static bimolecular quenching.
To explain our results we adopted the Smoluchowski model and obtained a reasonable estimate
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Except where otherwise noted, this item's license is described as © 2014 Tibor Zoltan Janosi et al. This is an open access article distributed under the Creative Commons Attribution 3.0. License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work in properly cited. The Creative Commons Public Domain Dedication waiver applies to the data made available in this article, unless otherwise stated.