The iron (II) spin crossover complex Fe(1,10-phenanthroline)2(NCS)2, dubbed Fe-phen, has been studied with scanning tunnelling microscopy, after adsorption on the "herringbone" reconstructed surface of Au(111) for sub-monolayer coverages. The Fe-phen molecules attach, through their NCS-groups, to the Au atoms of the fcc domains of the reconstructed surface only, thereby lifting the herringbone reconstruction. The molecules stack to form 1D chains, which run along the Au [110] directions. Neighboring Fe-phen molecules are separated by approximately 2.65 nm, corresponding to 9 atomic spacings in this direction. The molecular axis, defined by the two phen groups, is aligned perpendicular to the chain axis, along the Au[221 ̅ ]. direction, thereby bridging over 5 atomic spacings, in this direction. Experimental evidence suggests that the molecular spins are locked in a mixed state in the sub-monolayer regime at temperatures between 100 K and 300 K.

中文翻译：

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自旋交叉配合物 Fe(phen)2(NCS)2 在 Au(111) 上的位点选择性吸附


铁 (II) 自旋交叉络合物 Fe(1,10-菲咯啉)2(NCS)2（称为 Fe-phen）在吸附在 Au(111) 的“人字形”重建表面上后，通过扫描隧道显微镜进行了研究亚单层覆盖。 Fe-phen 分子通过其 NCS 基团仅附着到重建表面的 fcc 域的 Au 原子上，从而提升人字形重建。分子堆叠形成一维链，沿着 Au [110] 方向延伸。相邻的 Fe-phen 分子间隔约 2.65 nm，相当于该方向上的 9 个原子间距。由两个 phen 基团定义的分子轴沿着 Au[221 ̅ ] 垂直于链轴排列。方向，从而在这个方向上桥接超过5个原子间距。实验证据表明，在 100 K 至 300 K 的温度下，分子自旋被锁定在亚单层区域的混合状态。