Emergence of On-Surface Magnetochemistry
Emergence of On-Surface Magnetochemistry
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DOI：
10.1021/jz400984k
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发表时间：
2013-07-18
影响因子：
5.7
通讯作者：
Jung, Thomas A.
中科院分区：
文献类型：
--
作者：
Ballav, Nirmalya;Waeckerlin, Christian;Jung, Thomas A.
分子-衬底界面交换耦合的控制是分子自旋电子学的一个关键特征。本展望综述了表面磁化学的新兴领域，其中配位化学应用于表面负载的金属卟啉和金属酞菁来控制它们的磁性能。介绍了表面作为多原子配体或“表面配体”的特殊性。化学配体和表面配体在同一平面配合物上作用的不对称性，将公认的“反式效应”改为“表面反式效应”。由于铁磁衬底上的ad配合物通常是交换偶联的，因此表面反式效应的磁化学含义特别令人感兴趣。不同配体的联合作用允许在表面超分子结构中对自旋态进行可重复性控制，并为在界面上构建和操作自旋系统开辟了新的途径。值得注意的是，自旋开关已被证明是通过与配体的相互作用（化学选择性）和单独通过在界面上的局部寻址来控制的。
The control of exchange coupling across the molecule-substrate interface is a key feature in molecular spintronics. This Perspective reviews the emerging field of on-surface magnetochemistry, where coordination chemistry is applied to surface-supported metal porphyrins and metal phthalocyanines to control their magnetic properties. The particularities of the surface as a multiatomic ligand or "surface ligand'' are introduced. The asymmetry involved in the action of a chemical ligand and a surface ligand on the same planar complexes modifies the well-established ''trans effect'' to the notion of the ''surface-trans effect". As ad-complexes on ferromagnetic substrates are usually exchange-coupled, the magnetochemical implications of the surface-trans effect are of particular interest. The combined action of the different ligands allows for the reproducible control of spin states in on-surface supramolecular architectures and opens up new ways toward building and operating spin systems at interfaces. Notably, spin-switching has been demonstrated to be controlled collectively via the interaction with a ligand (chemical selectivity) and individually via local addressing at the interface.