Citation:
Cheng Jie Li, Ya Qing Feng, Xiu Jun Liu, Tian Yi Zhang. The synthesis of porphyrin-anthraquinone dyad via an azo-rearrangement[J]. Chinese Chemical Letters,
;2011, 22(5): 539-542.
doi:
10.1016/j.cclet.2010.11.031
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One novel porphyrin p-Q2 is planned to be synthesized by condensation between ATPP and Q1.However, after separation by chromatography and characterization with IR, 1H NMR, HR-MS and X-ray, p-Q1 is obtained unexpectedly.Compared the structure of p-Q1 with that of p-Q2, it is realized that an intramolecular cyclization rearrangement takes place when the azo group is situated in the o-position to the amido group.This rearrangement offers a new way to prepare indazole heterocycle.In addition, the spectral properties of p-Q1 have been studied by UV-vis and steady state fluorescence spectroscopy.Strong fluorescence quenching is observed in the preliminary emission spectrum due to the proposed electron transfer from the excited porphyrin to the anthraquinone moieties.
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Keywords:
- Porphyrin,
- Anthraquinone,
- Azo-rearrangement,
- Fluorescence quenching
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