Interaction of meso-tetrakis ( p-sulfonatophenyl) porphyrin (TSPP) with pyrimidines: A steady state and time-resolved fluorescence quenching study
Fluorescence quenching of meso-tetrakis ( p-sulfonatophenyl) porphyrin (TSPP) by certain pyrimidines has been investigated by using steady state and time-resolved fluorescence techniques. The pyrimidines used are uracil, 5-fluorouracil, 5-chlorouracil, 5-bromouracil, 5-iodouracil and 5-aminouracil....
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| Veröffentlicht in: | Journal of molecular structure 2009-02, Vol.919 (1), p.79-82 |
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| container_title | Journal of molecular structure |
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| creator | Kathiravan, A. Anbazhagan, V. Asha Jhonsi, M. Renganathan, R. |
| description | Fluorescence quenching of meso-tetrakis (
p-sulfonatophenyl) porphyrin (TSPP) by certain pyrimidines has been investigated by using steady state and time-resolved fluorescence techniques. The pyrimidines used are uracil, 5-fluorouracil, 5-chlorouracil, 5-bromouracil, 5-iodouracil and 5-aminouracil. The quenching was found to obey the Stern–Volmer equation and the corresponding Stern–Volmer plots were linear from both steady state and time-resolved measurements, indicating dynamic nature of quenching and the bimolecular quenching rate constants (
k
q) agreed well. Electron transfer from TSPP to pyrimidines were confirmed by the calculation of free energy change (
ΔG
et) using Rehm–Weller equation. |
| doi_str_mv | 10.1016/j.molstruc.2008.08.013 |
| format | Article |
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p-sulfonatophenyl) porphyrin (TSPP) by certain pyrimidines has been investigated by using steady state and time-resolved fluorescence techniques. The pyrimidines used are uracil, 5-fluorouracil, 5-chlorouracil, 5-bromouracil, 5-iodouracil and 5-aminouracil. The quenching was found to obey the Stern–Volmer equation and the corresponding Stern–Volmer plots were linear from both steady state and time-resolved measurements, indicating dynamic nature of quenching and the bimolecular quenching rate constants (
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p-sulfonatophenyl) porphyrin (TSPP) by certain pyrimidines has been investigated by using steady state and time-resolved fluorescence techniques. The pyrimidines used are uracil, 5-fluorouracil, 5-chlorouracil, 5-bromouracil, 5-iodouracil and 5-aminouracil. The quenching was found to obey the Stern–Volmer equation and the corresponding Stern–Volmer plots were linear from both steady state and time-resolved measurements, indicating dynamic nature of quenching and the bimolecular quenching rate constants (
k
q) agreed well. Electron transfer from TSPP to pyrimidines were confirmed by the calculation of free energy change (
ΔG
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p-sulfonatophenyl) porphyrin (TSPP) by certain pyrimidines has been investigated by using steady state and time-resolved fluorescence techniques. The pyrimidines used are uracil, 5-fluorouracil, 5-chlorouracil, 5-bromouracil, 5-iodouracil and 5-aminouracil. The quenching was found to obey the Stern–Volmer equation and the corresponding Stern–Volmer plots were linear from both steady state and time-resolved measurements, indicating dynamic nature of quenching and the bimolecular quenching rate constants (
k
q) agreed well. Electron transfer from TSPP to pyrimidines were confirmed by the calculation of free energy change (
ΔG
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Fluorescence quenching Photoinduced electron transfer Pyrimidines TSPP |
| title | Interaction of meso-tetrakis ( p-sulfonatophenyl) porphyrin (TSPP) with pyrimidines: A steady state and time-resolved fluorescence quenching study |
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