Further studies on the properties and effect of high energetic ionizing radiation on copper(II) complexes: 1H NMR, electronic absorption, ESR spectra and solid electrical conductivity

The effect of energetic gamma-radiation on H-1 NMR, electronic absorption, ESR spectra, differential thermal analysis (DTA) and solid state dc electrical conductivity of the ligand N-phenyl-2-(2-(phenylamino)acetyl)hydrazine carbothioamide (H2L) and its copper(II) complexes; Cu(HL)(OAc)H2O, Cu(HL)BrH2O and Cu(H2L)(2)(NO3)(2)a <...3H(2)O before and after gamma-irradiation (hereafter referred to as (B), (B (1) ), (B (2) ), (B (3) ) and (A), (A (1) ), (A (2) ), (A (3) ), respectively) has been studied. Electronic spectral bands of the complexes after irradiation exhibited some better resolved shapes with a remarkably higher absorbance, ESR spectrum of complex Cu(HL)BrH2O (B (2) ) before irradiation showed isotropic spectrum with g (iso) = 2.075 however, after irradiation (A (2) ) displayed axial ESR spectrum with g (ayen) > g (aSyen) > 2.0023 and d ((x2-y2)) ground state. DTA of the compounds reveals that gamma-irradiation induced generation of new peaks as well as changes in the peak intensities. Solid state dc electrical conductivity for complexes was investigated before and after gamma-irradiation. Complexes were found to be semiconductors, the activation energies (E (a)) were calculated for the complexes by using the Arrhenius plot.