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Quantum yields ϕ Δ of singlet oxygen ( 1 O 2 ) formation have been determined for 10 aryl azo naphtol dyes by flash photolysis. The 1 O 2 NIR luminescence signals at 1275nm sensitized by the dyes were compared with the signal obtained with the reference sensitizer, phenalenone. All aryl azo naphtols photosensitize the generation of 1 O 2 , but...
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