44
B. Prathima et al. / Spectrochimica Acta Part A 79 (2011) 39–44
Table 6
Effect of ligand and its metal complexes on scavenging of DPPH and Fe3+ induced lipid peroxidation at 100 M concentration.
Compound
DPPH scavenging (%)
Fe3+ induced lipid peroxidation
Ligand (L)
42
–
38
53
60
–
41
65
Mn(II) complex
Co(II) complex
␣-Tocopherol
free ligand and Co(II) complex show comparable activity in DPPH
scavenging and ferric ion induced lipid peroxidation as seen in the
case of standard antioxidant ␣-tocopherol, but Mn(II) complex has
not shown any activity (Table 6).
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In this paper, the ligand benzyloxybenzaldehyde-4-phenyl 3-
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The Mn(II) and Co(II) complexes are prepared with the ligand and
they are characterized with analytical and spectral techniques. The
EPR and electronic spectral studies of both the complexes indicate
near octahedral site symmetry for the metal ions. The ligand does
not exhibit any antibacterial activity but both the complexes give
considerable antibacterial activity. Free ligand and the Co(II) com-
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lipid peroxidation but the Mn(II) complex does not exhibit these
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Acknowledgements
Two of the authors B. Prathima and Y. Subba Rao are highly
grateful to the UGC, Government of India, and New Delhi for finan-
cial assistance in the form of an award of Meritorious Research
Fellowship. We sincerely thank Prof. J. Lakshmana Rao, Department
of Physics, S. V. University, Tirupati, for his help in EPR studies.
We also thank K. Madhavi, Institute of Pharmaceutical Technology,
Sri Padhmavati Mahila VisvaVidyalayam, Tirupati, for her help in
biological studies.
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