Open AccessElectron yield soft X‐ray photoabsorption spectroscopy under normal ambient‐pressure conditions
Author(s) -
Tamenori Yusuke
Publication year - 2013
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049513003592
Subject(s) - x ray absorption spectroscopy , chemistry , absorption spectroscopy , cobalt , ambient pressure , octahedron , anhydrous , spectroscopy , analytical chemistry (journal) , yield (engineering) , absorption (acoustics) , inorganic chemistry , ion , materials science , optics , physics , organic chemistry , chromatography , quantum mechanics , metallurgy , thermodynamics , composite material
Ambient‐pressure soft X‐ray photoabsorption spectroscopy (XAS) was demonstrated to be applicable to the chemical analysis of hydrated transition‐metal compounds. For this purpose, even under ambient‐pressure conditions, electron yield detection XAS (EY‐XAS), based on a simple drain‐current set‐up, was used to overcome a weakness in fluorescence yield detection XAS (FY‐XAS), which does not give a pure soft XAS. The feasibility of EY‐XAS was investigated and it was clarified that the EY‐XAS under ambient‐pressure conditions corresponds to the mixed data of the total EY and conversion EY spectra. Normal ambient‐pressure EY‐XAS analysis was applied to anhydrous (CoCl 2 ) and to hydrated (CoCl 2 ·6H 2 O) cobalt chloride at the Co L 23 ‐edge. The present measurements demonstrated the ability to unambiguously distinguish the different chemical states of cobalt ions, relying upon spectral differences that indicate octahedral/quasi‐octahedral structural changes as a result of hydration/dehydration reactions.