Nikolaev Institute of Inorganic Chemistry

Magnetic Relaxation of 1D Coordination Polymers

As the result of international collaboration the article of NIIC researchers Eugenia V. Peresypkina and Kira E. Vostrikova is published in Inorganic Chemistry (IF 4.794).

Substitution of the organic cation X in the 1D polymer, (X)₂[Mn(acacen)Fe(CN)₆] (acacen = N,N′-ethylenebis (acetylacetonylideneaminato), leads to an essential change in magnetic behavior. Due to the presence of more voluminous Ph₄P⁺ cations, the polyanion has a more geometrically distorted chain skeleton and, as a consequence, enhanced single chain magnet (SCM) characteristics compared to those for Et₄N⁺. The discussion is supported with ligand field calculations for [Fe(CN)₆]³⁻ that unveils the significant anisotropy of Fe magnetic moments in the case of (Ph₄P)₂[Mn(acacen)Fe(CN)₆]. The obtained results represent an important contribution in the design of the quantum molecular magnets as well as the new examples single chain magnets to be modeled by the theoreticians.

The fragment of the chain in polyanion {[Mn(acacen)Fe(CN)₆]²⁻}_n and the dependencies of χ'' (T) at different frequencies, demonstrating higher T_b for the chain (Ph₄P)₂[Mn(acacen)Fe(CN)₆].