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Spin- and phase transition in the spin crossover complex [Fe(ptz)6](BF4)2 studied by nuclear inelastic scattering of synchrotron radiation and by DFT calculations

  • Lars H. Böttger
  • , Aleksandr I. Chumakov
  • , C. Matthias Grunert
  • , Philipp Gütlich*
  • , Joachim Kusz
  • , Hauke Paulsen
  • , Ulrich Ponkratz
  • , Ventzislav Rusanov
  • , Alfred X. Trautwein
  • , Juliusz A. Wolny
  • *Korrespondierende/r Autor/-in für diese Arbeit
  • European Synchrotron Radiation Facility
  • Johannes Gutenberg-Universität Mainz
  • University of Silesia in Katowice
  • University of Sofia

Abstract

Nuclear inelastic scattering (NIS) spectra of [Fe(ptz)6](BF4)2 (ptz = 1-n-propyl-tetrazole) have been measured for five phases differing in spin state and crystallographic structure. Different spectral patterns have been found for the low-spin and high-spin phases and are described in terms of normal coordinate analysis of the complex molecule. For both low-spin and high-spin phases the conversion from ordered to disordered phase results in splitting of the observed NIS bands. Packing becomes visible in the NIS spectra via coupling of the Fe-N stretching vibrations with those of the terminal n-propyl groups. The DFT-based normal coordinate analysis also reveals the character of Raman markers.

OriginalspracheEnglisch
ZeitschriftChemical Physics Letters
Jahrgang429
Ausgabenummer1-3
Seiten (von - bis)189-193
Seitenumfang5
ISSN0009-2614
DOIs
PublikationsstatusVeröffentlicht - 29.09.2006

Fördermittel

Financial support by the Deutsche Forschungsgemeinschaft (DFG) (Tr 97/31, Tr 97/32 and Gü 95/58) and by the combined DFG-CNRS programme is gratefully acknowledged.

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