MEASUREMENT OF PHOTOGENERATED SINGLET OXYGEN (O-1(2) ((1)DELTA(G))) IN AQUEOUS-SOLUTION BY SPECIFIC CHEMICAL TRAPPING WITH SODIUM 1,3-CYCLOHEXADIENE-1,4-DIETHANOATE
V. Nardello et al., MEASUREMENT OF PHOTOGENERATED SINGLET OXYGEN (O-1(2) ((1)DELTA(G))) IN AQUEOUS-SOLUTION BY SPECIFIC CHEMICAL TRAPPING WITH SODIUM 1,3-CYCLOHEXADIENE-1,4-DIETHANOATE, Journal of photochemistry and photobiology.B, Biology, 39(2), 1997, pp. 146-155
A new method for the determination of the quantum yields of singlet ox
ygen (O-1(2)((1) Delta(g))) formation in aqueous media is described. I
t is based on the chemical trapping of O-1(2) with sodium 1,3-cyclohex
adiene-1,4-diethanoate (CHDDE), a specific, water-soluble trap which e
xhibits transparency to visible and near-UV light. The advantages and
limits of this method are illustrated with various photosensitizers: n
alidixic acid, rose bengal and sodium tetraphenylporphine tetrasulphon
ate.