Rev.Adv.Mater.Sci.(RAMS)
No 2, Vol. 14, 2007, pages 97-103

PHOTOACOUSTIC AND EPR STUDIES OF TWO COPPER(II) COMPLEXES WITH SPERMINE ANALOGUES

N. Guskos, V. Likodimos, J. Typek, M. Maryniak, E. Grech and B. Kolodziej

Abstract

Two polyamine copper(II) compounds of spermine analogues: Cu[H2N(CH2)3NH(CH2)2NH(CH2)3NH2](ClO4)2 (abbreviated as Spc323) and Cu[H2N(CH2)3NH(CH2)3NH(CH2)3NH2](ClO4)2 (abbreviated as Spc333) have been synthesized and characterized by spectroscopic methods. The electron paramagnetic resonance (EPR) and photoacoustic spectroscopies have been used for studying Cu2+ d-d transitions. The EPR spectra of copper(II) ions in both complexes have displayed a different crystal field symmetry: orthorhombic for Spc323 complex, and axial, with the hyperfine interaction, for Spc333 complex. In the visible region of electromagnetic radiation the photoacoustic absorptions from the d-d electron transitions with different energies and linewidths have been observed. Comparison of the obtained results is made with previous measurements on similar spermine compounds.

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