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Issue 8, 2019
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Photoinduced effects on the magnetic properties of the (Fe0.2Cr0.8)1.5[Cr(CN)6] Prussian blue analogue

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Abstract

One of the most attractive characteristics of some Prussian blue derivatives is the sensitivity of their magnetic properties to the irradiation with light. In this work photoinduced effects in the (Fe0.2Cr0.8)1.5[Cr(CN)6]·15H2O PBA have been studied by means of X-ray-based spectroscopies and magnetometry. It is found that the photosensitivity of this compound is mostly centred on the Fe cations: the exposure to green light induces a transfer of electrons from them to the Cr that provokes a reversal of the previously existing linkage isomerization and increases the elastic strain caused by the misfit of the unit cells of the Fe–NC–Cr and Cr–NC–Cr sublattices. The green light also quenches the magnetism of the FeII high-spin (HS) ions present in the sample and reduces the magnetic moments of most of the Cr cations except for CrII HS. Our study highlights the important role played by the mismatch between the unit cells of the coexisting sub-lattices in ternary Prussian blue analogues.

Graphical abstract: Photoinduced effects on the magnetic properties of the (Fe0.2Cr0.8)1.5[Cr(CN)6] Prussian blue analogue

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Publication details

The article was received on 19 Nov 2018, accepted on 22 Jan 2019 and first published on 22 Jan 2019


Article type: Paper
DOI: 10.1039/C8TC05815F
Citation: J. Mater. Chem. C, 2019,7, 2305-2317

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    Photoinduced effects on the magnetic properties of the (Fe0.2Cr0.8)1.5[Cr(CN)6] Prussian blue analogue

    F. J. Luque, I. A. Kowalik, J. P. Prieto-Ruiz, M. Á. Niño, H. Prima-García, F. M. Romero, D. Arvanitis, C. Mathonière, E. Coronado, R. Miranda and J. J. de Miguel, J. Mater. Chem. C, 2019, 7, 2305
    DOI: 10.1039/C8TC05815F

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