Soft x-ray absorption spectroscopy study of Prussian blue analogue ACo[Fe(CN)6]H2O nano-particles (A=Na, K)

被引：0
|
作者：
Eunsook Lee
D. H. Kim
Jihoon Hwang
J. -S. Kang
Nguyen Van Minh
In-Sang Yang
T. Ueno
M. Sawada
机构：
[1] The Catholic University of Korea,Department of Physics
[2] Hanoi National University of Education,Department of Physics
[3] Ewha Womans University,Department of Physics
[4] Hiroshima University,Hiroshima Synchrotron Radiation Center (HSRC)
来源：
Journal of the Korean Physical Society | 2013年 / 62卷
关键词：
XAS; Prussian blue; Molecular magnets; Electronic structure;
D O I：
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中图分类号：
学科分类号：
摘要：
The electronic structures of Prussian blue analogue ACo[Fe(CN)6]H2O (A=Na, K) nano-size particles has been investigated by employing soft X-ray absorption spectroscopy (XAS) at the Fe and Co L edges. Both Fe and Co ions are found to be Fe2+-Fe3+ and Co2+-Co3+ mixed-valent, with the average valence of v(Fe)∼ 2.36 and v(Co)∼ 2.41. This finding suggests that the mechanism of the photo-induced spin transition in ACo[Fe(CN)6]H2O (A=Na, K) is not a simple spin-state transition of Fe2+-Co3+ → Fe3+-Co2+. The Fe ions in ACo[Fe(CN)6]H2O are also found to have a strong covalent bonding to (CN)− ligands, but a very weak bonding to O(H2O), while Co ions have a stronger bonding to O(H2O) than to (CN)− ligands.
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页码：1910 / 1913
页数：3
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