Question
What are photosensitised chemical reactions? Explain giving suitable examples.
Answer :
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In photosensitized reactions, the absorbed photon excites the sensitizer (abbreviated Sen in Figure 1) to one or more energy-rich state(s) (indicated by an asterisk, Sen*). The excited Sen* undergoes internal reactions that ultimately result in the chemical alteration of the substrate. This can occur in one of two types of reactions (Figure 1
Photosensitization Reactions.
In the reaction, the excited sensitizer reacts directly with the substrate, in a one-electron transfer reaction,
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