High resolution K capture X-ray fluorescence spectroscopy: A new tool for chemical characterization

Journal Article · Wed May 26 04:00:00 EDT 1999 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja984454w· OSTI ID:684315

Bergmann, U ^[1]; Glatzel, P ^[2]; DeGroot, F ^[3]; Cramer, S P ^[1]

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1. Lawrence Berkeley National Lab., CA (United States). Physical Biosciences Div.
2. Univ. of California, Davis, CA (United States). Dept. of Applied Science
3. Univ. Utrecht (Netherlands). Dept. of Chemistry

The ability to probe specific chemical sites in complex systems would make X-ray spectroscopy a far more versatile spectroscopic tool. In vibrational and magnetic resonance spectroscopies, isotopic substitution is commonly employed to allow characterization of particular species. Except in a few special cases, such as gas-phase spectra of light elements, isotope effects are too small to be observed in X-ray absorption spectra. An alternative approach is to examine the X-ray emission that results after electron capture by a radioactive isotope. Controlled introduction of electron-capture isotopes could result in specific labeling of chemically distinct sites. In this paper, the authors show that high-resolution capture fluorescence spectra can be obtained on a reasonable time scale. Chemical shifts in these spectra can be used to identify elemental spin states, oxidation states, and even the types of neighboring atoms.

• Sponsoring Organization: National Insts. of Health, Bethesda, MD (United States); USDOE, Washington, DC (United States)
• OSTI ID: 684315
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 20 Vol. 121; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ELECTRON CAPTURE
IRON 55
K CAPTURE
SPECTRA
X-RAY FLUORESCENCE ANALYSIS