Ligand-Enhanced Electron Transfer from Zinc Tetraphenylporphyrin to Pyridine-Based Anthraquinone
Corresponding Author(s) : Li-Zeng Liu
Asian Journal of Chemistry,
Vol. 25 No. 17 (2013): Vol 25 Issue 17 page 9857-9859
Enhancements of axial ligands on the electron transfer from excited zinc tetraphenylporphyrin (ZnTPP) to pyridine-based anthraquinone (AQPy) were studied in CH2Cl2 solution at room temperature by UV-visible, fluorescence and fluorescence decay methods. The change in fluorescence lifetime and fluorescence intensity of ZnTPP was found to depend on the formation of the axial ligation with pyridine-based electron acceptor, from 1.70 to 0.16 ns and 18 %, respectively. The intramolecular electron transfer rate constants (kc) values between ZnTPP-AEAQPy were obtained by calculating (kc = 5.7 × 109 s-1). Pyridine/phene-based anthraquinone derivatives were synthesized and characterized by 1H NMR, IR and ESI-MS.
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