Two Cyanide-Bridged Mn(II)-Nb(IV) Coordination Chain Ferrimagnets Promoted by Interchain Ferromagnetic Interactions.
作者： Michał Magott , Hanna Tomkowiak , Andrzej Katrusiak , Wojciech Nitek , Barbara Sieklucka
DOI: 10.1021/ACS.INORGCHEM.6B00269
关键词: Antiferromagnetism 、 Chemistry 、 Ferrimagnetism 、 Cyanide 、 Crystallography 、 Ferromagnetism 、 Stereochemistry 、 Molecule 、 Crystallization 、 Hydrogen bond 、 Ground state
摘要: Two new coordination chain compounds based on octacyanoniobate(IV) are reported: {[MnII(bpy)(H2O)2]2[NbIV(CN)8]·5H2O}n (1) and {[MnII(bpy)(H2O)2][MnII(bpy)2][NbIV(CN)8]·5H2O}n (2) (bpy = 2,2′-bipyridine). Both have the topology of vertex-sharing CN-bridged squares. The Mn2Nb2 units mutually parallel in 1 perpendicular 2. antiferromagnetic intrachain interactions between MnII NbIV centers 2, typical for MnII-[NbIV(CN)8] family compounds, lead to ferrimagnetic ground state each single chain. show bulk ordering below their critical temperatures (Tc) 6.4 K 4.7 Such a behavior is due ferromagnetic interchain interactions, assured by π–π contacts 2,2′-bipyridine rings hydrogen bonds terminal cyanide ligands [NbIV(CN)8]-building blocks coordination/crystallization water molecules. 2 rare examples ferrimagnets promoted exchange, an...
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