Singlet-triplet state disposition

Figure 5.8 Disposition of (tt, tt ) and (n, ) singlet and triplet energy states for a few representative types of molecules and their emission characteristics. [F. Wilkinson and A.R.Horrocks inE-J. Bowen (ed), Luminiscence in Chemistry, D. Van Norstand, 19681...

Figure 5.13. Various possiblities for the disposition of the lowest singlet and triplet (n,jT ) and states of organic molecules (adapted from Wilkinson, 1968).

Figure 4 shows the relative disposition of redox potentials of the anionic porphyrin ZnTPPC referred to earlier, with resepct to the valence and conduction band edges of Ti02. As an amphoteric oxide, the band edge positions are pH-dependent and shown are values at two pH values. Both the singlet and triplet excited states can, in principle, inject charges into the... 

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