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Fluorenyl porphyrins for combined two-photon excited fluorescence and photosensitization.

Abstract : The two-photon absorption (2PA), the luminescence and the photosensitization properties of porphyrin-cored fluorenyl dendrimers and meso-substituted fluorenylporphyrin monomer, dimer and trimer are described. In comparison with model tetraphenylporphyrin, these compds. combine enhanced (non-resonant) 2PA cross-sections in the near IR and enhanced fluorescence quantum yields, together with maintained singlet oxygen generation quantum yields. 'Semi-disconnection' between fluorenyl groups and porphyrins (i.e. direct meso substitution) proved to be more efficient than non-conjugated systems (based on efficient FRET between fluorenyl antennae and porphyrins). These results are of interest for combined two-photon imaging and photodynamic therapy.
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Submitted on : Thursday, May 21, 2015 - 2:35:14 PM
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Olivier Mongin, Vincent Hugues, Mireille Blanchard-Desce, Areej Merhi, Samuel Drouet, et al.. Fluorenyl porphyrins for combined two-photon excited fluorescence and photosensitization.. Chemical Physics Letters, Elsevier, 2015, 625, pp.151--156. ⟨10.1016/j.cplett.2015.03.003⟩. ⟨hal-01153413⟩

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