Photoinduced Magnetism in Core/Shell Prussian Blue Analogue Heterostructures of KjNik[Cr(CN)6]l路nH2O with Rba

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• 作者：Matthieu F. Dumont ; Elisabeth S. Knowles ; Amandine Guiet ; Daniel M. Pajerowski ; Ariel Gomez ; Stefan W. Kycia ; Mark W. Meisel ; Daniel R. Talham
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：May 16, 2011
• 年：2011
• 卷：50
• 期：10
• 页码：4295-4300
• 全文大小：835K
• 年卷期：v.50,no.10(May 16, 2011)
• ISSN：1520-510X

文摘

Core/shell and core/shell/shell particles comprised of the Prussian blue analogues K_jNi_k[Cr(CN)₆]_l路nH₂O (A) and Rb_aCo_b[Fe(CN)₆]_c路mH₂O (B) have been prepared for the purpose of studying persistent photoinduced magnetization in the heterostructures. Synthetic procedures have been refined to allow controlled growth of relatively thick (50鈥?00 nm) consecutive layers of the Prussian blue analogues while minimizing the mixing of materials at the interfaces. Through changes in the order in which the two components are added, particles with AB, ABA, BA, and BAB sequences have been prepared. The two Prussian blue analogues were chosen because B is photoswitchable, and A is ferromagnetic with a relatively high magnetic ordering temperature, 70 K, although it is not known to exhibit photoinduced changes in its magnetic properties. Magnetization measurements on the heterostructured particles performed prior to irradiation show behavior characteristic of the individual components. On the other hand, after irradiation with visible light, the heterostructures undergo persistent photoinduced changes in magnetization associated with both the B and A analogues. The results suggest that structural changes in the photoactive B component distort the normally photoinactive A component, leading to a change in its magnetization.