Energy Transfer in Ce0.85Tb0.15F3 Nanoparticles-CTAB Shell-Chlorin e6 System

Formation and electronic excitation energy transfer process in the nanosystem consisting of Ce 0.85 Tb 0.15 F 3 nanoparticles, cetrimonium bromide (CTAB) surfactant, and chlorin e 6 photosensitizer were studied. It was shown that chlorin e 6 molecules bind to Ce 0.85 Tb 0.15 F 3 NP in the presence of CTAB forming thus Ce 0.85 Tb 0.15 F 3 NP-CTAB-chlorin e 6 nanosystem. We consider that binding occurs via chlorin e 6 embedding in the shell of CTAB molecules, formed around NP. In the Ce 0.85 Tb 0.15 F 3 NP-CTAB-chlorin e 6 nanosystem, electronic excitation energy transfer from Ce 3+ to chlorin e 6 takes place both directly (with the 0.33 efficiency for 2 μM chlorin e 6 ) and via Tb 3+ .