Moessbauer, electronic, and structural properties of bis(pyridine)dithiocyanatoiron(II). Ferromagnetically ordered polymer

Structural and thermal analysis of silicon isothiocyanates complexes of Fe(III) and Mn(II)

“…,~ All the studied complexes have spectral bands (Table 2) in the typical pseudooctahedral range, which are in good agreement with those of known octahedral and pseudo-octahedral complexes of the analogous isothiocyanate complexes [14,15].…”

A Rational Route to Coordination Polymers with Condensed Networks and Cooperative Magnetic Properties

“…For these investigations pyridine was selected in the beginning because several compounds of composition M(NCS) 2 (pyridine) 4 (M = Mn, Fe, Co, Ni, and Cd) and M(NCS) 2 (pyridine) 4 were already reported in the literature (Figure 14). [154][155][156][157][158][159][160][161][162][163] [ [164][165][166][167][168][169][170] In this context it is noted that pyridine is a relatively volatile ligand and thus, might be removed completely in one step, which would lead to the formation of the pure metal thiocyanates. However, on heating all these precursors looses half of the ligands in the first step and transforms quantitatively into the corresponding pyridine-deficient compounds, in which the transition metal cations are octahedrally coordinated by two Figure 14).…”

“…However, on heating all these precursors looses half of the ligands in the first step and transforms quantitatively into the corresponding pyridine-deficient compounds, in which the transition metal cations are octahedrally coordinated by two Figure 14). [164][165][166][167][168][169][170] The magnetic properties of the iron compound [Fe(NCS) 2 (pyridine) 2 ] n have been already investigated and ferromagnetism was observed. [170] Later on Foner et al has shown that a metamagnetic transition occurs.…”

“…[164][165][166][167][168][169][170] The magnetic properties of the iron compound [Fe(NCS) 2 (pyridine) 2 ] n have been already investigated and ferromagnetism was observed. [170] Later on Foner et al has shown that a metamagnetic transition occurs. [167] For the nickel compound we also observed metamagnetism and for [Mn(NCS) 2 (pyridine) 2 ] n an antiferromagnetic transition occurs.…”

Fe(Me2-bpy)2(NCSe)2spin-crossover micro- and nanoparticles showing spin-state switching above 250 K

“…It is well established that in contrast to the methods developed for the elaboration of oxide nanostructures, 24,25 softer thermal conditions may lead either to a molecular rearrangement via the migration of ligands between the coordination spheres of two metal ions, 26 or to a coordination polymer via partial decomposition and a rearrangement of halide (or pseudohalide like NCX) ions to form bridges between metal ions. 27 Finally, Guionneau has identified for some particular spin-crossover materials, a relationship between the solid-state crystallinity and thermal treatment. 22 From the background accumulated on spin-crossover Fe II materials, 28 it appears that the introduction of two diimine and pseudohalide ligands in the coordination sphere may be suitable for the achievement of a spin-state switching material.…”