Modified nanoparticles of Prussian Blue metal organic frameworks

Prussian Blue compounds (PBC), e.g. soluble AFe³⁺[Fe²⁺(CN)₆]·xH₂O (A = K, Na, NH₄), have shown a huge potantial of applications in physics, chemistry, medicine and radioecology, e.g., PBC acting as efficient ion exchanger extracting the radioistope ¹³⁷Cs in solutions. For potassium, proposed ferromagnetism by superexchange is discussed between Fe(III) with S=5/2 and an effective magnetic moment of µ_eff≈5.98µ_B consistent with a spin-only value of Fe(III) high-spin. Powder neutron diffraction studies showed a Curie temperature T_C≈5.6 K consistent with susceptibility measurements. Here, we are presenting the synthesis and low-energy investigation of modified magnetic Prussion-blue nanoparticles protected by PVP (polyvinylpyrrolidene).