Pressure Effect Studies on the Spin Transition of Microporous 3D Polymer [Fe(pz)Pt(CN)₄]

Pressure effects on the spin transition of the three-dimensional (3D) porous coordination polymer {Fe­(pz)­[Pt­(CN)₄]} have been investigated in the interval 10⁵ Pa–1.0 GPa through variable-temperature (10–320 K) magnetic susceptibility measurements and spectroscopic studies in the visible region at room temperature. These studies have disclosed a different behavior of the compound under pressure. In the magnetic experiments, a temperature independent paramagnetic behavior has been observed under 0.4 GPa. In contrast, at room temperature and at 0.8 GPa, a complete HS-to-LS transition has been evidenced. The differences in the magnetic behavior are strongly related with the porous structure of the compound and its capability to adsorb the oil used as pressure transmission media in the magnetic experiments