title: Covalent embedding of Ni2+/Fe3+ cyanometallate structures in silica by sol-gel processing.
abstract: Compound [Ni(AEAPTS)2]3[Fe(CN)6]2 (AEAPTS = N-(2-aminoethyl)-3-aminopropyltrimethoxysilane), in which Ni(2+) and Fe(3+) ions are ferromagnetically coupled through cyano bridges, was prepared. Sol-gel processing of the AEAPTS derivative resulted in incorporation of the cyanometallate in silica. The obtained material is magnetically ordered below 22 K with an effective magnetic moment μeff of 4.46 μB at room temperature, a maximum of 8.60 μB at approximately 15 K and a narrow hysteresis at 2 K, with a saturation remanence of about 300 emu mol(-1) and a coercitivity of 0.03 T.
authors.affiliation: Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Wien (Austria), Fax: (+43) 1-58801-15399.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Felbermair
authors.forename: Andrey
authors.initials: A
authors.lastname: Sidorenko
authors.forename: Silke
authors.initials: S
authors.lastname: Paschen
authors.forename: Johanna
authors.initials: J
authors.lastname: Akbarzadeh
authors.forename: Herwig
authors.initials: H
authors.lastname: Peterlik
authors.forename: Ulrich
authors.initials: U
authors.lastname: Schubert
keywords: cyanometallates; iron; magnetic properties; nickel; sol-gel processes