Abstract
Rate constant for the generation of 1O2 from commonly used triplet sensitizers: a systematic study of the wavelength effect using the ene reaction of 2,3-dimethyl-2-butene
Highlights
Singlet oxygen (1O2, [O2(1 g)]) is an activated form of oxygen that is readily accessible from ground state oxygen found in air
UV absorption of various sensitizers UV absorption spectra of the five sensitizers (MB, rose bengal (RB), eosin Y (EY), TPP, and C60) and emission spectra of 395 and 525 nm LEDs are shown in Figure 1 and 2, respectively
For both 395 and 525 nm LED irradiation, the k1 values were in the order of: methylene blue (MB) < EY < RB (MeOH), which was consistent with the reported relative rate obtained using an Ar ion laser (514.5 nm) [EY < RB (MeOH)],32 but the order of MB was different in the other solvent system EY < RB < MB.[31]
Summary
Singlet oxygen (1O2, [O2(1 g)]) is an activated form of oxygen that is readily accessible from ground state oxygen found in air.
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