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Synchrotron-based Nickel Mössbauer Spectroscopy
Leland B Gee1, Chun-Yi Lin1, Francis E Jenney2
1Department of Chemistry, University of California , Davis, California 95616, United States.
Inorganic Chemistry
|July 9, 2016
Summary
This study introduces synchrotron-based (61)Ni Mössbauer spectroscopy for analyzing nickel coordination complexes and metalloproteins. This novel method offers a promising alternative to traditional radioactive sources for Mössbauer spectroscopy.
Area of Science:
- Inorganic Chemistry
- Biochemistry
- Spectroscopy
Background:
- Mössbauer spectroscopy is a powerful technique for studying magnetic and electronic properties of materials.
- Traditional (61)Ni Mössbauer spectroscopy relies on radioactive sources, which can have limitations.
- Synchrotron radiation offers a tunable and intense X-ray source for spectroscopic applications.
Purpose of the Study:
- To establish and demonstrate the feasibility of synchrotron-based (61)Ni Mössbauer spectroscopy in the energy domain.
- To investigate the potential of this technique for analyzing diverse nickel-containing compounds, including coordination complexes and metalloproteins.
- To compare the performance of synchrotron-based measurements with traditional radioactive source methods.
Main Methods:
- Development of a novel experimental setup for synchrotron-based (61)Ni Mössbauer spectroscopy.
- Measurement of (61)Ni Mössbauer spectra for various nickel compounds: (61)NiCr2O4, a linear Ni amido complex, and (61)Ni-substituted rubredoxin.
- Analysis of spectral data, including Zeeman splittings and quadrupole interactions.
- Comparison of results with simulations and data obtained using traditional radioactive sources.
Main Results:
- Successful acquisition of reasonable (61)Ni Mössbauer spectra for all tested samples within approximately one day.
- Accurate determination of the internal magnetic field for (61)NiCr2O4 (44.6 T), consistent with previous studies.
- Characterization of a linear Ni amido complex with significant quadrupole splitting, showcasing the method's ability to handle complex geometries.
- Demonstration of feasibility for studying (61)Ni-substituted metalloproteins, specifically rubredoxin.
Conclusions:
- Synchrotron-based (61)Ni Mössbauer spectroscopy is a viable and promising alternative to traditional methods using radioactive sources.
- The technique demonstrates potential for the study of nickel coordination complexes and metalloproteins with high efficiency.
- Further improvements in experimental sensitivity could enhance the capabilities of this synchrotron-based approach.
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