Poly acrylic acid -Cu II complex

The UV irradiation of poly(acryhc acid)-copper(II) complex (3.29) causes the formation of a charge-transfer (CT) complex, which decomposes into polymer carboxy radical and Cu ion [515]  

The polymer carboxyl radical (3.30) is next decarboxylated into polymer alkyl radical (3.31) and COj  

The complex (3.32) can absorb the second photon and produce the alkyl-copper intermediate (5.33) and a solvated electron  

The solvated electron reacts rapidly with copper(II)-poly(acryhc acid) complex (3.29)  

Evidence for this mechanism has been obtained from transient spectra formed with maxima at 400 and 540 nm. 

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