Exploring the Role of the Central Carbide of the Nitrogenase Active-Site FeMo-cofactor through Targeted 13 C Labeling and ENDOR Spectroscopy
- Award ID(s):
- 1908587
- NSF-PAR ID:
- 10275415
- Date Published:
- Journal Name:
- Journal of the American Chemical Society
- Volume:
- 143
- Issue:
- 24
- ISSN:
- 0002-7863
- Page Range / eLocation ID:
- 9183 to 9190
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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We report on spectroscopic measurements on the
transition in neutral europium-151 and europium-153 at 459.4 nm. The center of gravity frequencies for the 151 and 153 isotopes, reported for the first time in this paper, to our knowledge, were found to be 652,389,757.16(34) MHz and 652,386,593.2(5) MHz, respectively. The hyperfine coefficients for the state were found to be , and , , which all agree with previously published results except for A(153), which shows a small discrepancy. The isotope shift is found to be 3163.8(6) MHz, which also has a discrepancy with previously published results.