Abstract
In this chapter, to obtain new ionic conductive magnetic material using octacyanometalate-based magnet, the incorporation of 4-aminopyridine as organic ligand is performed due to the capability of forming hydrogen bond. The reaction of MnII, [NbIV(CN)8], and 4-aminopyridine yielded yellow crystal formulated as Mn II3 [NbIV(CN)8]2(4-aminopyridine)10(4-aminopyridinium)2 · 12H2O. This compound possesses non-coordinated pyridinium cation and 1-dimensional infinite hydrogen-bonding networks constructed with ligand water molecules, non-coordinated water molecules, and 4-aminopyridinium cations. Magnetic measurements revealed that the present compound shows metamagnetism with a Neel temperature of 9 K. The impedance measurement showed that the present compound exhibits super-ionic conductivity (>10−4 S cm−1) which is caused by proton conduction based on the Grotthuss mechanism. In the present material, 4-aminopyridinium cation is incorporated into the flexible octacyanidometallate-based magnetic framework and plays an important role in the formation of the hydrogen-bonding network, which leads to the observation of super-ionic conductivity.
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Imoto, K. (2017). Observation of Coexistence of Super-Ionic Conductivity and Metamagnetism in Mn3[NbIV(CN)8]2(4-Aminopyridine)10(4-Aminopyridinium)2 · 12H2O. In: Multifunctional Molecular Magnets Based on Octacyanidometalates. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-10-6135-6_4
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DOI: https://doi.org/10.1007/978-981-10-6135-6_4
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