Observation of an Fe(II) spin-crossover in a cesium iron hexacyanochromate

Wataru Kosaka; Kiyoshi Nomura; Kazuhito Hashimoto; Shin-Ichi Ohkoshi

doi:10.1021/ja050118l

Observation of an Fe(II) spin-crossover in a cesium iron hexacyanochromate

J Am Chem Soc. 2005 Jun 22;127(24):8590-1. doi: 10.1021/ja050118l.

Authors

Wataru Kosaka¹, Kiyoshi Nomura, Kazuhito Hashimoto, Shin-Ichi Ohkoshi

Affiliation

¹ Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

PMID: 15954753
DOI: 10.1021/ja050118l

Abstract

In this work, we observed a spin-crossover phenomenon in a cesium iron hexacyanochromate, which is a Prussian blue analogue. This compound showed a thermal phase transition with transition temperatures of 211 K (T1/2 downward arrow) and 238 K (T1/2 upward arrow) due to a spin-crossover on FeII sites. This spin-crossover phase transition is accompanied by a lattice contraction of 0.38 A, but maintains a face-centered cubic structure (F3m). This is the first observation of FeII spin-crossover in a series of Prussian blue analogues.