Tuning the spin state of iron phthalocyanine by ligand adsorption
Tuning the spin state of iron phthalocyanine by ligand adsorption
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DOI：
10.1088/0953-8984/22/47/472002
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发表时间：
2010-12-01
影响因子：
2.7
通讯作者：
Schnadt, J.
中科院分区：
文献类型：
--
作者：
Isvoranu, C.;Wang, B.;Schnadt, J.
单分子磁体的未来应用将需要能够通过外部手段控制和操纵磁体的自旋状态和磁化强度。有不同的方法来控制这种控制，其中一种是通过吸附小配体分子来修饰磁铁。本文以Au（111）表面负载的酞菁铁为模型化合物，利用x射线光电子能谱和密度泛函理论证明，通过在铁离子上吸附氨、吡啶、一氧化碳或一氧化氮，可以将分子的自旋态调整到不同的值（S类似于0,1 /2,1）。这种相互作用还导致酞菁铁与Au（111）载体的电子解耦。
The future use of single-molecule magnets in applications will require the ability to control and manipulate the spin state and magnetization of the magnets by external means. There are different approaches to this control, one being the modification of the magnets by adsorption of small ligand molecules. In this paper we use iron phthalocyanine supported by an Au(111) surface as a model compound and demonstrate, using x-ray photoelectron spectroscopy and density functional theory, that the spin state of the molecule can be tuned to different values (S similar to 0, 1/2, 1) by adsorption of ammonia, pyridine, carbon monoxide or nitric oxide on the iron ion. The interaction also leads to electronic decoupling of the iron phthalocyanine from the Au(111) support.