of the latter shows two symmetry-related, interpenetrating Fe–btzb networks in which the iron(II) ions approach each other as close as 8.3 and 9.1 Å. This supramolecular catenane undergoes a sharp thermal spin transition around 160 K with hysteresis (20 K) along with a pronounced thermochromic effect. The spin crossover behaviour has been followed by magnetic, DSC, optical spectroscopy and 57Fe Mössbauer
制备了一系列新的式[M(btzb)3 ] [ClO 4 ] 2(M II = Fe,Ni或Cu)和btzb = 1,4-双(
四唑-1-基)
丁烷的聚合化合物,并他们的物理性质进行了调查。btzb
配体制备并确定其晶体结构以及3-D化合物[Fe(btzb)3 ] [ClO 4 ] 2的暂定晶体结构。后者的模型显示了两个与对称有关的互穿的Fe–btzb网络,其中
铁(II)离子彼此接近,接近8.3和9.1Å。这个超分子的链烷经历约160 K的急剧热自旋转变,并具有迟滞(20 K)以及明显的热致变色效应。自旋交叉行为之后是磁,数码相机, 光学的 光谱学和57 FeMössbauer光谱学测量。在低温下用绿光照射会导致热活性
铁离子(II)进入亚稳态的高自旋态。自旋交叉行为的性质已被详细讨论。