%0 Journal Article %J Journal of Physics D: Applied Physics %D 2000 %T Photoacoustic detection of d-d transitions and electronic structure of three polyamine copper complexes %A Guskos, N. %A Papadopoulos, G. %A V. Likodimos %A Mair, G.L.R. %A Majszczyk, J. %A Typek, J. %A Wabia, M. %A Grech, E. %A Dziembowska, T. %A Perkowska, T.A. %X The potential of photoacoustic spectroscopy to resolve the crystal field levels of Cu2+ ions in three polyamine copper complexes, aqua spermine copper sulfate trihydrate [NH2(CH2)3NH(CH2)4NH(CH2)3 NH2·Cu2+·H2O]·SO42-·3H2O, norspermine copper sulfate trihydrate [NH2(CH2)3NH(CH2)3NH(CH2)3 NH2·Cu2+·SO42-]·3H2O, and homospermine copper sulfate dihydrate [NH2(CH2)3 NH(CH2)2NH(CH2)3 NH2·Cu2+·SO42-]·2H2O, has been explored along with UV/VIS and electron paramagnetic resonance (EPR) spectroscopy. Intense absorption is detected in the photoacoustic spectrum corresponding to the d-d transition band weakly traced in the corresponding optical spectrum. The observed fine structure photoacoustic lines are assigned to the individual d-d transitions of Cu2+ ions, which are further exploited to determine the diverse metal-ligand interaction of the studied compound employing simple crystal field analysis. %B Journal of Physics D: Applied Physics %V 33 %P 2664-2668 %G eng %U https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034295992&doi=10.1088%2f0022-3727%2f33%2f20%2f320&partnerID=40&md5=9ee45d63d5d4ebedf3318e164d38355d %R 10.1088/0022-3727/33/20/320