Photophysics of Ochratoxin A in Aqueous Solution
The photophysics of Ochratoxin A (OTA) in aqueous solution strongly depends on the pH. Due to its molecular structure OTA is prone to an excited state proton transfer reaction, which rules the photophysical properties. Based on results of absorption and fluorescence measurements the rate constants o...
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| Veröffentlicht in: | Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 2008-11, Vol.63 (11), p.1321-1326 |
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| container_title | Zeitschrift für Naturforschung. B, A journal of chemical sciences |
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| creator | Steinbrück, Dörte Rasch, Claudia Kumke, Michael U. |
| description | The photophysics of Ochratoxin A (OTA) in aqueous solution strongly depends on the pH. Due to its molecular structure OTA is prone to an excited state proton transfer reaction, which rules the photophysical properties. Based on results of absorption and fluorescence measurements the rate constants of the proton transfer reactions (forward and back reaction) were determined and subsequently, the pK
value was calculated. Based on the results, optimized experimental conditions for the analysis can be determined e. solvent conditions (HPLC chromatography) or excitation and emission wavelength (fluorescence spectroscopy). |
| doi_str_mv | 10.1515/znb-2008-1111 |
| format | Article |
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| ispartof | Zeitschrift für Naturforschung. B, A journal of chemical sciences, 2008-11, Vol.63 (11), p.1321-1326 |
| issn | 0932-0776 1865-7117 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Excited State Kinetics Fluorescence Detection Ochratoxin A Photophysics Proton Transfer |
| title | Photophysics of Ochratoxin A in Aqueous Solution |
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