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Enhanced One‐ and Two‐Photon Excitation Emission of a Porphyrin Photosensitizer by FRET from a Conjugated Polyelectrolyte
Author(s) -
Wu Chuanliu,
Xu QingHua
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800655
Subject(s) - porphyrin , förster resonance energy transfer , photosensitizer , two photon excitation microscopy , photochemistry , conjugated system , excitation , chemistry , photodynamic therapy , materials science , fluorescence , optics , physics , organic chemistry , polymer , quantum mechanics
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.