Superacids in heterocyclic chemistry

Having presented the chemistry of the main classes of onium salt cationic photoinitiators, this section will be used to further elaborate on their use in cationic polymerizations. Those onium salts that generate Bronsted superacids on photolysis are technically capable of initiating the cationic polymerizations of all known polymerizable electron-rich vinyl and heterocyclic monomers. Figure 4 provides an overview of the photopolymerizations of some of the more commonly used classes of monofimctional vinyl and heterocyclic monomers and is not intended to be inclusive. 

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