(1R)-(-)Camphorquinone are used as visible light photoinitiator for biomedical applications such as in dental surgery.
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Camphorquinone, a 1,2-diketone, is a photoinitiator that finds wide use in the curing of resin composites. It functions by initiating the chain polymerization by free radical generation; typically with the aid of co-initiator amines.
Purification Methods
It can be purified by steam distillation, recrystallisation (yellow prisms) from EtOH, *C6H6 or Et2O/pet ether and it can be sublimed in a vacuum. The (±)-quinone forms needles from EtOH, m 197-198o, 203o. [Buxtorf & Flatt Helv Chim Acta 13 1026 1930, Asahena et al. Chem Ber 67 1432 1934, Beiltein 7 I 325.]
