Unexpected isotope effect on the spin transition of the coordination polymer Fe(C5H5N)2[Ni(CN)4]Dedicated to Patrick Cassoux on the occasion of his retirement.
Physical Chemistry Chemical Physics2003Vol. 5(8), pp. 1682–1688
Citations Over Time
Kazumasa Hosoya, Takafumi Kitazawa, Masashi Takahashi, Masuo Takeda, Jean‐François Meunier, Gábor Molnár, Azzedine Bousseksou
Abstract
The two-dimensional coordination polymer spin-crossover compound Fe(pyridine)2[Ni(CN)4] (1) and its isotope substituted analogues Fe(pyridine-D5)2[Ni(CN)4] (2) and Fe(pyridine-15N)2[Ni(CN)4] (3) have been synthesised and the isotope effect on the thermal spin-crossover behaviour has been studied using magnetic susceptibility, 57Fe Mössbauer, Raman and calorimetric techniques. All these methods confirmed that upon isotope substitution—contrary to previous observations—the spin transition temperature shifted downwards from 202 to 194 K. The theoretical analysis of spectroscopic data has revealed that this shift was a result of a subtle balance between different vibrational and electronic factors.
Related Papers
- → Spin crossover iron(III) complexes(2007)302 cited
- → A Spin‐Crossover Cluster of Iron(II) Exhibiting a Mixed‐Spin Structure and Synergy between Spin Transition and Magnetic Interaction(2008)184 cited
- → An iron(ii) incomplete spin-crossover compound: pressure effects and Mössbauer spectroscopy study(2010)33 cited
- → 57Fe Mössbauer spectroscopic and magnetic study of a spin-crossover polymer complex, Fe(3-chloropyridine)2Ni(CN)4(1999)31 cited
- → A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes(2014)1 cited