Influence of Selenocyanate Ligands on the Transition Temperature and Cooperativity of bapbpy-Based Fe(II) Spin-Crossover Compounds
作者:Sipeng Zheng、Maxime A. Siegler、Olivier Roubeau、Sylvestre Bonnet
DOI:10.1021/ic502381m
日期:2014.12.15
capacity measurements were carried out for compounds 9, 11, 13, 15, and 16, and fitted to the Sorai domain model. The number n of like-spin SCO centers per interacting domain, which is a quantitative measure of the cooperativity of the spin transition, was found to be high for compounds 11 and 15, and low for compounds 9, 11, and 13. Compound 15 is one of the few known SCO compounds that is more cooperative
配体bapbpy的协调(1,bapbpy = N, N'-二(吡啶-2-基)-2,2'-联吡啶-6,6'-二胺),它的四甲基取代的类似物中的一个的2 - 5(R 2 bapbpy = N, N'-二(甲基吡啶-2-基)-2,2'-联吡啶-6,6'-二胺),或它的三个双之一的(异)喹啉类似物6 - 8(R 2 bapbpy = N,N′-二(喹啉基)-2,2′-联吡啶-6,6′-二胺),转化为Fe(NCSe)2,得到八种[Fe类型的新铁(II)化合物。 (R 2 bapbpy)(NCSe)2 ](9 – 16)。这些化合物(三个11,13,和16)的结构特征在于单晶X射线衍射,其显示出相似的分子几何形状及包装相比,他们的硫氰酸类似物。磁化率测量进行所有铁化合物和揭示了化合物热旋交叉(SCO)行为9,11,13,15,和16。化合物11,13,15,和16显示出相比于硫氰酸盐类似物的增加的转变