Transition-Metal Dependent Cation Disorder in the Chiral Cubic AB(HCO2)3 Metal-Organic Frameworks (A = Li or Na, B = Mn or Co)
Transition-Metal Dependent Cation Disorder in the Chiral Cubic AB(HCO2)3 Metal-Organic Frameworks (A = Li or Na, B = Mn or Co)
复制标题
手性立方 AB(HCO2)3 金属有机骨架中过渡金属依赖性阳离子无序（A = Li 或 Na，B = Mn 或 Co）
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
P. Saines
中科院分区：
文献类型：
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作者：
J. Aston;P. Saines
本研究检查了 AB(HCO2)3（A = Li 或 Na，B = Mn 或 Co）金属有机框架的晶体结构，我们发现其采用手性立方 P213 结构。这表明含锂的甲酸盐与其钠类似物是同构的，从而扩展了这种手性结构的相稳定性。含Mn化合物具有与α-Mn类似的磁性亚晶格，由于其高度受挫的反铁磁耦合而长期受到关注。相比之下，钴甲酸盐似乎具有部分无序的碱金属和过渡金属阳离子，这阻止了干净的α-Mn类磁性亚晶格的形成。我们还重新检查了 NaMn(HCO2)3 的磁性，发现它是一种低至 2 K 的简单顺磁体，仅具有弱反铁磁耦合。
This study examines the crystal structures of the AB(HCO2)3 (A = Li or Na and B = Mn or Co) metal-organic frameworks, which we find to adopt a chiral cubic P213 structure. This shows that the Li containing formates are isostructural with their Na analogues, extending the phase stability of this chiral architecture. The Mn containing compounds have a magnetic sublattice similar to ?-Mn, long of interest due to its highly frustrated antiferromagnetic coupling. In contrast the Co formates appear to have partially disordered alkali and transition metal cations, which prevents the formation of a clean ?-Mn-like magnetic sublattice. We have also re-examined the magnetic properties of NaMn(HCO2)3 finding it to be a simple paramagnet down to 2 K with only weak antiferromagnetic coupling.