Inorg Chem. 2018 Nov 19;57(22):14443-14449. doi: 10.1021/acs.inorgchem.8b02718. Epub 2018 Nov 5.
We have identified six new 4d and 4d compounds with isolated RuCl octahedra, with formulas (HMA)RuCl·Cl (1; MA = methylamine), (HGly)RuCl·Cl (2; gly = glycine), (HGly)RuCl·2HO (3), (NH)RuCl (4), (HPy)RuCl (5; py = pyridine), and H(4,4'-bpy)RuCl (6; 4,4'-bpy = 4,4'-bipyridine). We find that the temperature-dependent magnetization is well described by single-ion physics in the presence of spin-orbit coupling and negligible superexchange interactions. Further, we find that many compounds in the literature are also well described by single-ion physics, and our results demonstrate the importance of considering single-ion physics when evaluating candidate geometric frustrated magnets in the presence of spin-orbit coupling.
我们已经确定了六个具有孤立 RuCl 八面体的新型 4d 和 4d 化合物，其分子式为（HMA）RuCl·Cl（1；MA = 甲胺）、（HGly）RuCl·Cl（2；gly = 甘氨酸）、（HGly）RuCl·2HO（3）、（NH）RuCl（4）、（HPy）RuCl（5；py = 吡啶）和 H（4,4'-bpy）RuCl（6；4,4'-bpy = 4,4'-联吡啶）。我们发现，在存在自旋轨道耦合和可忽略的超交换相互作用的情况下，温度依赖性磁化可以很好地用单离子物理来描述。此外，我们发现文献中的许多化合物也可以很好地用单离子物理来描述，我们的结果表明，在存在自旋轨道耦合的情况下，评估候选几何各向异性磁体时，考虑单离子物理是很重要的。
