Anthrasemiquinone radical

The photolysis of non-photochromic l-acetoxy-9,10-anthraquinone in alcohols resulted in a photochemical reaction of hydrogen atom removal from solvent.21 This reaction is typical for 9,10-anthraquinones. The absorption spectmm that was observed after a flash pulse was similar to the absorption spectrum of the anthrasemiquinone radical. The lifetime of this radical depended on the oxygen concentration in solution. 

When an anion-radical initiator bears chemically active groups, it is incorporated into the polymer chain. Eor instance, the polymer obtained from styrene under initiation by 9,10-anthraquinone anion-radical, that is, anthrasemiquinone, contains oxyanthracenyl (ethereal) fragments (Karpinets 2004). It is seemingly suitable to introduce functional groups into macromolecules through this way. 

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