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2003 | 103 | 2-3 | 301-313
Article title

Charge Transfer and f-f Transitions Studied by Photoacoustic Spectroscopy of [R(NO_3)_2(PicBH)_2]NO_3 and [R(NO_3)_3(PicBH)_2] Complexes (R - Rare Earth Ion)

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EN
Abstracts
EN
High-resolution photoacoustic spectra of trinitrato-bis[N-(2-pyridyl-methylene)-N'-benzoyl-hydrazine]R (III), (R = La, Ce, Pr), and binitrato-bis[N-(2-pyridylmethylene)-N'-benzoyl-hydrazine]R(III) nitrate (R=Y, Nd, Eu, Yb, Tb, Gd, Ho, Dy, Er) complexes, in the visual region, were studied for powder samples. Very intense photoacoustic spectra of various shapes were attributed to the intraligand transitions of the π → π* type located mainly on the C=N group and the n → π* transitions located on the carbonyl group. The intensity of these transitions essentially depends on the type of rare earth ions. The existence of f-f electron transitions could influence the relaxation processes, which play an important role in intensity determination of the above transitions. For many investigated samples the energy levels of excited states of rare earth ions were identified (f-f electron transitions). The radiation energy for some of the rare earth ions were compared with the d-d electron transitions of certain copper(II) organometallic complexes, which are very important in biogenic systems. The correlation between ions with localized and extended wave functions is suggested.
Keywords
EN
Publisher

Year
Volume
103
Issue
2-3
Pages
301-313
Physical description
Dates
published
2003-02/03
received
2002-09-05
Contributors
author
  • Solid State Section, Department of Physics, University of Athens, Panepistimiopolis, 15784 Zografos, Athens, Greece
  • Solid State Section, Department of Physics, University of Athens, Panepistimiopolis, 15784 Zografos, Athens, Greece
author
  • Institute of Physics, Technical University of Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
author
  • Institute of Physics, Technical University of Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
author
  • Institute of Physics, Technical University of Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
author
  • Faculty of Applied Mathematics and Physics, National Technical University of Athens, 15780 Athens, Greece
  • Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece
author
  • Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece
author
  • Applied Physics Section, Department of Physics, University of Athens, anepistimiopolis, 15784 Zografos, Athens, Greece
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv103n210kz
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