Covalent embedding of Ni2+/Fe3+ cyanometallate structures in silica by sol-gel processing

Elisabeth Felbermair; Andrey Sidorenko; Silke Paschen; Johanna Akbarzadeh; Herwig Peterlik; Ulrich Schubert

doi:10.1002/chem.201402805

Covalent embedding of Ni2+/Fe3+ cyanometallate structures in silica by sol-gel processing

Chemistry. 2014 Jul 21;20(30):9212-5. doi: 10.1002/chem.201402805. Epub 2014 May 27.

Authors

Elisabeth Felbermair¹, Andrey Sidorenko, Silke Paschen, Johanna Akbarzadeh, Herwig Peterlik, Ulrich Schubert

Affiliation

¹ Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Wien (Austria), Fax: (+43) 1-58801-15399.

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.

Keywords: cyanometallates; iron; magnetic properties; nickel; sol-gel processes.

© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.