Photochemical Study of Cobalt (II) in Dimethyl Sulfoxide, Simethylformamide and Chloroform Solvents

  • Farah Ibrahim Department of Chemistry, College of Science, Al-Nahrain University, Baghdad-Iraq.
  • Dheaa Zageer Department of Chemistry, College of Science, Al-Nahrain University, Baghdad-Iraq.
  • Duha Fadhil Department of Chemistry, College of Science, Al-Nahrain University, Baghdad-Iraq.
  • Hadeel Adil Department of Chemistry, College of Science, Al-Nahrain University, Baghdad-Iraq.
  • Emad Yousif Department of Chemistry, College of Science, Al-Nahrain University, Baghdad-Iraq.
  • Zainab Hussain Department of Chemistry, College of Science, Misan University, Misan-Iraq.
Keywords: Photodecomposition, DMSO, Co(II), DMF, Chloroform

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.



Published
2018-05-24
How to Cite
Ibrahim, F., Zageer, D., Fadhil, D., Adil, H., Yousif, E., & Hussain, Z. (2018). Photochemical Study of Cobalt (II) in Dimethyl Sulfoxide, Simethylformamide and Chloroform Solvents. Al-Nahrain Journal of Science, 19(3), 48-52. Retrieved from https://anjs.edu.iq/index.php/anjs/article/view/205
Section
Articles

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