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Triplet oxygen, definition

The triplet state of the unpaired electrons of oxygen play a key role in both the photon excitation and the potential relaxation mode of the excited chromophores of vision. The paramagnetic properties of oxygen provide a definitive method of determining whether oxygen is present in the chromophores of vision, a condition that would eliminate the Shiff-base theory of retinol reaction with opsin to form rhodopsin. The evaluation of the electron paramagnetic resonance of the chromophores of vision is discussed in Chapter 7. [Pg.43]

Finally, the non-bonding electrons can form i(n, tz ) states advantageous for the Si Ti process necessary for triplet formation. Whether the non-bonding electrons on the pyrrole nitrogens, as opposed to those on the carbonyl oxygens, are primarily responsible for the formation of the i(n, 7T ) state has not been definitively shown at this time. [Pg.158]

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Triplet oxygen

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