The family of hybrid layered fluoride perovskites has been extended, based on the only previously reported example (enH₂)MnF₄ (en = 1,2-diaminoethane), to include further divalent transition metals and longer chain diamines. The compounds (enH₂)BF₄, (B = Co, Ni) and (bnH₂)BF₄, (bn = 1,4-diaminobutane, B = Mn, Co) adopt the same space group (P2₁/c) as (enH₂)MnF₄, whereas (pnH₂)BF₄, (pn = 1,3-diaminopropane, B = Mn, Co) adopt the space group Pnma. Key differences in these structure types are shown to depend on the parity of the number of carbon atoms in the linear amine, which may be considered a structure-directing agent. Magnetic measurements on selected samples indicate differences in magnetic order that can be understood in terms of both the transition metal and the molecular species. All samples exhibit antiferromagnetic correlations but can in some cases develop a canted spin ferromagnetic component due to anisotropic exchange interactions. An additional compound, (bn)Ni₂F₄, has also been isolated, which exhibits a unique layered structure with bn acting as a ligand rather than in cationic form.

中文翻译：

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扩展混合层状氟化物钙钛矿家族


基于先前报道的唯一示例 (enH ₂ )MnF ₄ (en = 1,2-二氨基乙烷)，杂化层状氟化物钙钛矿家族已得到扩展，包括进一步的二价过渡金属和长链二胺。化合物 (enH ₂ )BF ₄ 、(B = Co, Ni) 和 (bnH ₂ )BF ₄ 、(bn = 1,4-二氨基丁烷，B = Mn, Co)采用与(enH ₂ )MnF ₄ 相同的空间群(P2 ₁ /c)，而(pnH ₂ )BF ₄ 、(pn = 1,3-二氨基丙烷, B = Mn, Co) 采用空间群Pnma。这些结构类型的主要差异取决于线性胺中碳原子数的奇偶性，线性胺可被视为结构导向剂。对选定样品的磁性测量表明磁序的差异，可以根据过渡金属和分子种类来理解。所有样品都表现出反铁磁相关性，但在某些情况下，由于各向异性交换相互作用，可能会形成倾斜的自旋铁磁成分。另外一种化合物 (bn)Ni ₂ F ₄ 也已被分离出来，它表现出独特的层状结构，其中 bn 作为配体而不是阳离子形式。