Porphyrin‐based systems are widely used as photosensitizers for photodynamic therapy, photocatalysis, and drug release. Strategies to enhance one‐ or two‐photon excitation emission of porphyrin sensitizers have been of great interest and significance. Here we report an electrostatic assembly, which comprises a cationic conjugated polyelectrolyte, PFP, and a negatively charged hematoporphyrin (HP). An enhancement of over 9‐fold in the HP emission intensity for one‐photon excitation Förster resonance energy transfer (FRET), and an enhancement factor of 30‐fold for two‐photon excitation FRET were obtained. This electrostatic assembly can be easily modified in the future to construct DNA‐ or protein‐programmed enhancement of porphyrin emission, which will be of great interest in porphyrin‐based applications. magnified image
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Wu et al. (2008) studied this question.
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