Rapid spin-state interconversion in the Bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by Mössbauer spectroscopy

H. Winkler; A. X. Trautwein; H. Toftlund

doi:10.1007/BF02397517

Rapid spin-state interconversion in the Bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by Mössbauer spectroscopy

H. Winkler^*, A. X. Trautwein, H. Toftlund

^*Corresponding author for this work

Institute of Physics

University of Southern Denmark

20 Citations (Scopus)

Abstract

Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N₆] type above room temperature. The Mössbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-Mössbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔE_LH=18(1) kJmol^-1 is deduced.

Original language	English
Journal	Hyperfine Interactions
Volume	70
Issue number	1-4
Pages (from-to)	1083-1086
Number of pages	4
ISSN	0304-3843
DOIs	https://doi.org/10.1007/BF02397517
Publication status	Published - 01.04.1992

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title = "Rapid spin-state interconversion in the Bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by M{\"o}ssbauer spectroscopy",

abstract = "Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N6] type above room temperature. The M{\"o}ssbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-M{\"o}ssbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔELH=18(1) kJmol-1 is deduced.",

author = "H. Winkler and Trautwein, {A. X.} and H. Toftlund",

year = "1992",

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AU - Winkler, H.

AU - Trautwein, A. X.

AU - Toftlund, H.

PY - 1992/4/1

Y1 - 1992/4/1

N2 - Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N6] type above room temperature. The Mössbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-Mössbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔELH=18(1) kJmol-1 is deduced.

AB - Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N6] type above room temperature. The Mössbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-Mössbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔELH=18(1) kJmol-1 is deduced.

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IS - 1-4

ER -

Rapid spin-state interconversion in the Bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by Mössbauer spectroscopy

Abstract

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