We present an overview of very recent advances in the engineering of magnetic networks based on octacyanometalates. The selected magnetic networks of Cu II W V , Ni II W V and Mn II LNb IV (L -organic bridging linker) illustrate the possible strategies for tuning of the magnetic characteristics. The combination of magnetic ordering for 2D (two-dimensional) and 3D (threedimensional) networks together with the solvent sensitivity of a cyano-bridged framework resulted in the development of a novel 3D {[Mn II (imH)] 2 [Nb IV (CN) 8 ]} assembly with magnetic sponge character, characterized by T c of 62 K, the highest ever observed for octacyanometalate-based networks.
A comprehensive study of the magnetocaloric effect (MCE) in the Mn 2 -[Nb(CN) 8 ] molecular magnet with a two-step magnetic sponge behavior is reported. The structural transformations provoked by dehydration bring about an increase in the magnetic ordering temperature (T c ) from 43 K through to 68 K and up to 98 K. All three phases are soft isotropic
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