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

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 300; no. 2; pp. 867 - 872
• Main Authors: Abou Sekkina, M. M., El-Boraey, H. A., Aly, S. A.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-05-2014; Springer
• Subjects: Acetates; Activation energy; Chemistry; Chemistry and Materials Science; Copper compounds; Diagnostic Radiology; Electric properties; Electrical conductivity; Hadrons; Heavy Ions; Inorganic Chemistry; Ionizing radiation; Nuclear Chemistry; Nuclear Physics; Nuclear radiation; Physical Chemistry; DTA; Solid electrical conductivity; Electronic absorption; ESR spectra; γ-Irradiation; H NMR
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-014-3053-x

The effect of energetic γ-radiation on
1
H 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 (H
2
L) and its copper(II) complexes; Cu(HL)(OAc)H
2
O, Cu(HL)BrH
2
O and Cu(H
2
L)
2
(NO
3
)
2
⋅3H
2
O before and after γ-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)BrH
2
O (
B
2
) before irradiation showed isotropic spectrum with
g
iso
 = 2.075 however, after irradiation (
A
2
) displayed axial ESR spectrum with
g
∥
 > 
g
⊥
 > 2.0023 and
d
(
x
2−
y
2)
ground state. DTA of the compounds reveals that γ-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 γ-irradiation. Complexes were found to be semiconductors, the activation energies (
E
a
) were calculated for the complexes by using the Arrhenius plot.