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

Eunsook Lee; D. H. Kim; Jihoon Hwang; J. S. Kang; Nguyen Van Minh; In Sang Yang; T. Ueno; M. Sawada

doi:10.3938/jkps.62.1910

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

Eunsook Lee, D. H. Kim, Jihoon Hwang, J. S. Kang, Nguyen Van Minh, In Sang Yang, T. Ueno, M. Sawada

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1910-1913
Number of pages	4
Journal	Journal of the Korean Physical Society
Volume	62
Issue number	12
DOIs	https://doi.org/10.3938/jkps.62.1910
State	Published - Jul 2013

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation under Contract No. 2011-0022444 and in part by the 2013 Research Fund of the Catholic University of Korea. N. V. M. acknowledges support by the National Foundation for Science and Technology Development (NAFOSTED) of Vietnam and Research Foundation-Flanders (FWO) of Belgium (Code FWO 2011.23). Synchrotron experiment was performed at the HSRC under the approval of the Proposal Assessing Committee.

Keywords

Electronic structure
Molecular magnets
Prussian blue
XAS

Access to Document

10.3938/jkps.62.1910

Cite this

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

abstract = "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.",

keywords = "Electronic structure, Molecular magnets, Prussian blue, XAS",

author = "Eunsook Lee and Kim, {D. H.} and Jihoon Hwang and Kang, {J. S.} and {Van Minh}, Nguyen and Yang, {In Sang} and T. Ueno and M. Sawada",

note = "Funding Information: This work was supported by the National Research Foundation under Contract No. 2011-0022444 and in part by the 2013 Research Fund of the Catholic University of Korea. N. V. M. acknowledges support by the National Foundation for Science and Technology Development (NAFOSTED) of Vietnam and Research Foundation-Flanders (FWO) of Belgium (Code FWO 2011.23). Synchrotron experiment was performed at the HSRC under the approval of the Proposal Assessing Committee.",

year = "2013",

month = jul,

doi = "10.3938/jkps.62.1910",

language = "English",

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pages = "1910--1913",

journal = "Journal of the Korean Physical Society",

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TY - JOUR

T1 - Soft x-ray absorption spectroscopy study of Prussian blue analogue ACo[Fe(CN)6]H2O nano-particles (A=Na, K)

AU - Lee, Eunsook

AU - Kim, D. H.

AU - Hwang, Jihoon

AU - Kang, J. S.

AU - Van Minh, Nguyen

AU - Yang, In Sang

AU - Ueno, T.

AU - Sawada, M.

N1 - Funding Information: This work was supported by the National Research Foundation under Contract No. 2011-0022444 and in part by the 2013 Research Fund of the Catholic University of Korea. N. V. M. acknowledges support by the National Foundation for Science and Technology Development (NAFOSTED) of Vietnam and Research Foundation-Flanders (FWO) of Belgium (Code FWO 2011.23). Synchrotron experiment was performed at the HSRC under the approval of the Proposal Assessing Committee.

PY - 2013/7

Y1 - 2013/7

N2 - 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.

AB - 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.

KW - Electronic structure

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