Dynamic effects in iron phthalocyanine-like compounds

• Authors: Arũnas Amulevičius , Kęstutis Mažeika , Vidmantas Remeikis , Algimantas Undzėnas
• Languages of publication: EN

Abstracts

EN

57Fe isotope-enriched iron phthalocyanine has been synthesized and studied by the Mössbauer spectroscopic method. The samples were investigated in the temperature range 100–350 K. Some peculiarities in atomic and molecular electronic structure fluctuations were observed. The intermediate Fe oxidation states are observed and it has been found that the rate of charge redistribution is temperature-dependent. The correlation between the temperature behavior of the isomeric shift and quadrupole splitting has been demonstrated. At elevated temperatures above 300 K, the Fe2+ oxidation number is quasistable. The alteration of Fe oxidation number is associated with fluctuations of electron charges, and the electron-accepting and electron-donating properties of surrounding ligands. The energy barriers separating Fe oxidation states have been determined. The possibility of modeling Mössbauer spectra of electron-transfer systems has been shown.

Keywords

EN

Iron phthalocyanine; Mössbauer spectroscopy; Fe oxidation number; charge distribution; isomeric shift; quadrupole splitting

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2007
• Volume: 5
• Issue: 2
• Pages: 135-150

Dates

published

1 - 6 - 2007

online

12 - 2 - 2007

Contributors

author

Arũnas Amulevičius

• Institute of Physics, LT-02300, Vilnius, Lithuania

author

Kęstutis Mažeika

• Institute of Physics, LT-02300, Vilnius, Lithuania

author

Vidmantas Remeikis

• Institute of Physics, LT-02300, Vilnius, Lithuania

author

Algimantas Undzėnas

• Institute of Physics, LT-02300, Vilnius, Lithuania

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Identifiers

DOI

10.2478/s11534-007-0003-z