Abstract
Photoinduced electron transfer (PET) from the hydrophobic triphenylbenzylborate anion to the water-soluble tricationic N,N'-bis [3-(trimethylammonio)propyl]thiadicarbocyanine was investigated in water and in phosphatidylcholine membrane systems. The borate (donor) and dye (acceptor) form a strong complex in water,leading to inefficient PET. In the presence of liposomes, the hydrophobic borate anion is bound deep within a bilayer. The resulting negative surface charge of the liposomes leads to electrostatic binding of the cationic dye within the head group region of the membrane
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