@article {Guskos200797,
	title = {Photoacoustic and EPR studies of two copper(II) complexes with spermine analogues},
	journal = {Reviews on Advanced Materials Science},
	volume = {14},
	number = {2},
	year = {2007},
	note = {cited By 3},
	pages = {97-103},
	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. {\textcopyright} 2007 Advanced Study Center Co. Ltd.},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-34250028178\&partnerID=40\&md5=42e2af1ee6d8f340e925829e73af6d6d},
	author = {Guskos, N. and V. Likodimos and Typek, J. and Maryniak, M. and Grech, E. and Kolodziej, B.}
}
