학술논문
Soft X-ray Absorption Spectroscopy Study of Prussian Blue Analogue ACo[Fe(CN)6]H2O Nano-particles (A=Na, K)
Document Type
Article
Source
Journal of the Korean Physical Society, 62(12), pp.1910-1913 Jun, 2013
Subject
Language
English
ISSN
1976-8524
0374-4884
0374-4884
Abstract
The electronic structures of Prussian blue analogue ACo[Fe(CN)6]H2O (A=Na, K) nano-sizeparticles has been investigated by employing soft X-ray absorption spectroscopy (XAS) at the Feand 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 mechanismof the photo-induced spin transition in ACo[Fe(CN)6]H2O (A=Na, K) is not a simple spin-statetransition of Fe2+-Co3+ ! Fe3+-Co2+. The Fe ions in ACo[Fe(CN)6]H2O are also found to havea strong covalent bonding to (CN)− ligands, but a very weak bonding to O(H2O), while Co ionshave a stronger bonding to O(H2O) than to (CN)− ligands.