title: Photoinduced magnetism in core/shell Prussian blue analogue heterostructures of K(j)Ni(k)[Cr(CN)6]l·nH2O with Rb(a)Co(b)[Fe(CN)6]c·mH2O.
abstract: Core/shell and core/shell/shell particles comprised of the Prussian blue analogues K(j)Ni(k)[Cr(CN)(6)](l)·nH(2)O (A) and Rb(a)Co(b)[Fe(CN)(6)](c)·mH(2)O (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 (50-100 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.
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
authors.forename: Matthieu F
authors.initials: MF
authors.lastname: Dumont
authors.forename: Elisabeth S
authors.initials: ES
authors.lastname: Knowles
authors.forename: Amandine
authors.initials: A
authors.lastname: Guiet
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Pajerowski
authors.forename: Ariel
authors.initials: A
authors.lastname: Gomez
authors.forename: Stefan W
authors.initials: SW
authors.lastname: Kycia
authors.forename: Mark W
authors.initials: MW
authors.lastname: Meisel
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Talham