Author/Authors :
ibrahim, farah al-nahrain university - college of science - department of chemistry, Iraq , zageer, dheaa al-nahrain university - college of science - department of chemistry, Iraq , fadhil, duha al-nahrain university - college of science - department of chemistry, Iraq , hussain, zainab misan university - college of science - department of chemistry, Misan, Iraq , adil, hadeel al-nahrain university - college of science - department of chemistry, Iraq , yousif, emad al-nahrain university - college of science - department of chemistry, Iraq
Abstract :
The photochemistry of chelate complex 2-(6-methoxynaphthalen-2-yl) propanoic acid cobalt (II) Co(L)2 was studied in three polar aprotic solvents: Dimethyl sulfoxide (DMSO), Dimethylformamide (DMF) and chloroform (CHCl3). Monochromatic light of wavelength 311 nm was used for the irradiation process at 25oC. Uv-visible spectral changes indicated an intra oxidation-reduction reaction occuring during the photolysis of Co(L)2 complex, with homolytic scission of Co-L bond. The quantum yield (d), rate of photodecomposition and reactivity ratio (k2/k-1) was determined in each solvent. These values always increase as the polarity of the solvent increases and follow the order: DMSO DMF CHCl3 The mechanism of photodecomposition of this complex under the applied conditions was proposed.
Keywords :
Photodecomposition , Co(II) , DMSO , DMF , Chloroform.
