Photodegredation of Schiff Bases Copper(II) Complexes in Dimethyl Sulphoxid (DMSO)

Photodecomposition of dichlorobis N [4-Azo benzene aniline)2-hydroxy benzilidene] Copper (II) (Complexe A1) and dichloro N[2-Azo 3- sulphonic -2- naphthol) 6- carboxylic 2- hydroxy benzilidene] copper (II) (Complex A2).have been performed at λ = 373 nm for complex A1and at λ = 358 nm for complex A2 in dimethy l sulphoxide at 25C◦. the absorbance spectrum of these complexes have been recorded with time of irradiation in order to examine the kinetics of p hotodecay. The apparent rate constant (Kd) for the first order reaction has been calculated and found to be 1.1 ×10^-2 min^-1 for complexe A1 and 2.34 × 10^-2 min^-1 for camplexe A2. the primary quantum yields (Ø ) has also been calculated and found to be 2.810×10^-1 and 0.2765 ×10^-1 for complex A1 and A2 resp ectively .