Probing Coster鈥揔ronig Transitions in Aqueous Fe2+ Solution Using Inverse Partial and Partial Fluorescence Yield at the L-Edge
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- 作者：Malte D. Gotz ; Mikhail A. Soldatov ; Kathrin M. Lange ; Nicholas Engel ; Ronny Golnak ; Ren茅 K枚nnecke ; Kaan Atak ; Wolfgang Eberhardt ; Emad F. Aziz
- 刊名：The Journal of Physical Chemistry Letters
- 出版年：2012
- 出版时间：June 21, 2012
- 年：2012
- 卷：3
- 期：12
- 页码：1619-1623
- 全文大小：275K
- 年卷期：v.3,no.12(June 21, 2012)
- ISSN：1948-7185
文摘
Specific Coster鈥揔ronig (CK) transitions in 3d transition metals are close to the threshold of energetic possibility, being disallowed in free atoms, while possible in solids. Moreover, they have been shown to be quite sensitive to chemical bonding. Nevertheless, there has been no direct study of such behavior in solution. Here we present an approach to quantify such transitions in solution, by comparing relative fluorescence of different edges to their relative absorption strengths. The difficulties of acquiring a measurement of the absorption in solution are overcome by applying the recently developed method of inverse partial fluorescence yield to a liquid sample using the microjet. This method has been demonstrated on solids to be bulk sensitive and able to obtain absorption spectra free of self-absorption or saturation effects. We extend this approach to investigate the L-edge of aqueous Fe2+ using a combination of a soft X-ray light source and a high-resolution X-ray emission spectrometer.