Portal de Periódicos da CAPES

The Effect of Iron Concentration on the High-Spin\(\rightleftarrows\)Low-Spin Transitions in Iron Compounds

1980; Physical Society of Japan; Volume: 49; Issue: 5 Linguagem: Inglês

10.1143/jpsj.49.1806

1347-4073

Takeshi Kambara,

Protein Structure and Dynamics

Sorai et al. (Chem. Phys. 18 (1976) 199) observed that the spin transition temperature in [Fe x Zn 1- x (2-pic) 3 ]Cl 2 ·C 2 H 5 OH varies linearly with iron concentration and the slope of the temperature dependence curve of the high-spin content becomes less steep with decreasing concentration. This dilution effect on the high-spin\(\rightleftarrows\)low-spin transition is studied on the basis of the ligand field theory by taking account of the coupling between d electrons of iron and a lattice strain. The calculated temperature dependence of the high-spin content for various iron concentration reproduces the essential features of the observed results including the linear dependence of the spin transition temperature on the concentration.