Abstract
AbstractThe utility of dimethyl 3,3′‐(4‐methyl‐1,3‐naphthylene)dipropionate (DMNDP) as a singlet oxygen trap in biological systems is described. The determination of the rate constant for the reaction of DMNDP with singlet oxygen in acetonitrile gave a value of 9.8 · 10−7 M−1s−1; the half‐life of the corresponding endoperoxide at 37°C in phosphate buffered saline is 412 min. DMNDP does not possess sensitizing properties, and its usefulness for the detection of singlet oxygen is demonstrated in the photooxidation of liposomes by 5,10,15,20‐tetraphenyl‐21H, 23H‐porphine (TPP).
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