School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife KY16 9ST, UK.
Nat Chem. 2011 Aug 28;3(10):801-6. doi: 10.1038/nchem.1129.
Frustrated magnetic lattices offer the possibility of many exotic ground states that are of great fundamental importance. Of particular significance is the hunt for frustrated spin-1/2 networks as candidates for quantum spin liquids, which would have exciting and unusual magnetic properties at low temperatures. The few reported candidate materials have all been based on d(9) ions. Here, we report the ionothermal synthesis of NH(4)[C(7)H(14)N][V(7)O(6)F(18)], an inorganic-organic hybrid solid that contains a S = 1/2 kagome network of d(1) V(4+) ions. The compound exhibits a high degree of magnetic frustration, with significant antiferromagnetic interactions but no long-range magnetic order or spin-freezing above 2 K, and appears to be an excellent candidate for realizing a quantum spin liquid ground state in a spin-1/2 kagome network.
受挫磁晶格提供了许多具有重大基础重要性的奇特基态的可能性。特别有意义的是寻找受挫的自旋-1/2 网络作为量子自旋液体的候选物，它们在低温下具有令人兴奋和不寻常的磁性。已报道的少数候选材料均基于 d(9) 离子。在这里，我们报告了 NH(4)[C(7)H(14)N][V(7)O(6)F(18)] 的离子热合成，这是一种包含 d(1) V(4+) 离子 S = 1/2 kagome 网络的无机-有机杂化固体。该化合物表现出高度的磁受挫，具有显著的反铁磁相互作用，但在 2 K 以上没有长程磁有序或自旋冻结，并且似乎是在自旋-1/2 kagome 网络中实现量子自旋液体基态的优秀候选物。
