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Synchrotron-based Nickel Mössbauer Spectroscopy.
Inorganic chemistry
  • Leland B Gee
  • Chun-Yi Lin
  • Francis E Jenney, Philadelphia College of Osteopathic Medicine
  • Michael W W Adams
  • Yoshitaka Yoda
  • Ryo Masuda
  • Makina Saito
  • Yasuhiro Kobayashi
  • Kenji Tamasaku
  • Michael Lerche
  • Makoto Seto
  • Charles G Riordan
  • Ann Ploskonka
  • Philip P Power
  • Stephen P Cramer
  • Lars Lauterbach
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We used a novel experimental setup to conduct the first synchrotron-based (61)Ni Mössbauer spectroscopy measurements in the energy domain on Ni coordination complexes and metalloproteins. A representative set of samples was chosen to demonstrate the potential of this approach. (61)NiCr2O4 was examined as a case with strong Zeeman splittings. Simulations of the spectra yielded an internal magnetic field of 44.6 T, consistent with previous work by the traditional (61)Ni Mössbauer approach with a radioactive source. A linear Ni amido complex, (61)Ni{N(SiMe3)Dipp}2, where Dipp = C6H3-2,6-(i)Pr2, was chosen as a sample with an "extreme" geometry and large quadrupole splitting. Finally, to demonstrate the feasibility of metalloprotein studies using synchrotron-based (61)Ni Mössbauer spectroscopy, we examined the spectra of (61)Ni-substituted rubredoxin in reduced and oxidized forms, along with [Et4N]2[(61)Ni(SPh)4] as a model compound. For each of the above samples, a reasonable spectrum could be obtained in ∼1 d. Given that there is still room for considerable improvement in experimental sensitivity, synchrotron-based (61)Ni Mössbauer spectroscopy appears to be a promising alternative to measurements with radioactive sources.
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Citation Information
Leland B Gee, Chun-Yi Lin, Francis E Jenney, Michael W W Adams, et al.. "Synchrotron-based Nickel Mössbauer Spectroscopy." Inorganic chemistry Vol. 55 Iss. 14 (2016) p. 6866 - 6872
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