The Orientation of the Electric Field Gradient Tensor in CO-Liganded Myoglobin

F. Parak; U. F. Thomanek; D. Bade; B. Wintergerst

doi:10.1515/znc-1977-7-805

The Orientation of the Electric Field Gradient Tensor in CO-Liganded Myoglobin

F. Parak, U. F. Thomanek, D. Bade, B. Wintergerst

Chair of Biomedical Physics

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The EFG-tensor at the position of the Fe-atom of CO-liganded sperm whale myoglobin has been investigated by nuclear γ-resonance absorption experiments on single crystals. In addition the temperature dependence of the quadrupole splitting of the 14.4 keV level of the iron nucleus was measured. An unambiguous solution for the magnitude and the orientation of the field gradient tensor could only be obtained with the assumption that a C₂-axis perpendicular to the haem plane is one principal axis of the electric field gradient tensor. Within this solution the electronic structure of the iron is described by a singlet ground state with η_z = 0.75 and the largest EFG component perpendicular to the haem plane.

Original language	English
Pages (from-to)	507-512
Number of pages	6
Journal	Zeitschrift fur Naturforschung - Section C Journal of Biosciences
Volume	32
Issue number	7-8
DOIs	https://doi.org/10.1515/znc-1977-7-805
State	Published - 1 Aug 1977

Keywords

EFG-Tensor
Myoglobin-CO Single Crystal
Mössbauer Spectra

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title = "The Orientation of the Electric Field Gradient Tensor in CO-Liganded Myoglobin",

abstract = "The EFG-tensor at the position of the Fe-atom of CO-liganded sperm whale myoglobin has been investigated by nuclear γ-resonance absorption experiments on single crystals. In addition the temperature dependence of the quadrupole splitting of the 14.4 keV level of the iron nucleus was measured. An unambiguous solution for the magnitude and the orientation of the field gradient tensor could only be obtained with the assumption that a C2-axis perpendicular to the haem plane is one principal axis of the electric field gradient tensor. Within this solution the electronic structure of the iron is described by a singlet ground state with ηz = 0.75 and the largest EFG component perpendicular to the haem plane.",

keywords = "EFG-Tensor, Myoglobin-CO Single Crystal, M{\"o}ssbauer Spectra",

author = "F. Parak and Thomanek, {U. F.} and D. Bade and B. Wintergerst",

note = "Funding Information: This work was supported by the Bundesministerium f{\"u}r Forschung und Technologie. We are indebted to Professors R. L. M{\"o}ssbauer and G. M. Kalvius for their continuous support of this work.",

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AU - Wintergerst, B.

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AB - The EFG-tensor at the position of the Fe-atom of CO-liganded sperm whale myoglobin has been investigated by nuclear γ-resonance absorption experiments on single crystals. In addition the temperature dependence of the quadrupole splitting of the 14.4 keV level of the iron nucleus was measured. An unambiguous solution for the magnitude and the orientation of the field gradient tensor could only be obtained with the assumption that a C2-axis perpendicular to the haem plane is one principal axis of the electric field gradient tensor. Within this solution the electronic structure of the iron is described by a singlet ground state with ηz = 0.75 and the largest EFG component perpendicular to the haem plane.

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KW - Mössbauer Spectra

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The Orientation of the Electric Field Gradient Tensor in CO-Liganded Myoglobin

Abstract

Keywords

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