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Normalized absorption (lines a and c) and photoluminescence (lines b and d) spectra of PFBT in buffer (black) and in films (blue). Absorption (line e) and emission (line f) of PNAI-Cy5 are red. Photoluminescence spectra were obtained by excitation at 460 nm for PFBT and at 645 nm for Cy5. The buffer is 25 mM phosphate buffer (pH, 7.4).
