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The pH Dependence of the Total Fluorescence of Graphite Oxide

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Abstract

Graphite oxide was characterized by pH dependent excitation-emission matrices from 300 to 500 nm in excitation and from 320 to 600 nm in emission which reveal the presence of two pH steps. These are assigned to the presence of carboxy groups and phenolic hydroxy groups, respectively. Fluorescence is strongest at 470 nm excitation and 555 nm emission. The fluorescence intensity is a function of pH but not of temperature, and is not quenched by oxygen.

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Acknowledgement

The work was performed within the frame of the Graduate College 1570 funded by the DFG (Deutsche Forschungsgemeinschaft).

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Authors and Affiliations

  1. Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93053, Regensburg, Germany

    Sven Kochmann, Thomas Hirsch & Otto S. Wolfbeis

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  1. Sven Kochmann
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  2. Thomas Hirsch
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  3. Otto S. Wolfbeis
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Correspondence to Thomas Hirsch.

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Kochmann, S., Hirsch, T. & Wolfbeis, O.S. The pH Dependence of the Total Fluorescence of Graphite Oxide. J Fluoresc 22, 849–855 (2012). https://doi.org/10.1007/s10895-011-1019-8

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  • DOI: https://doi.org/10.1007/s10895-011-1019-8

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