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首页> 外文期刊>Chemistry: A European journal >Magnetic and Electrochemical Properties of a TEMPO-Substituted Disulfide Diradical in Solution, in the Crystal, and on a Surface
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Magnetic and Electrochemical Properties of a TEMPO-Substituted Disulfide Diradical in Solution, in the Crystal, and on a Surface

机译：TEMPO取代的二硫化二自由基在溶液中，晶体中和表面上的磁性和电化学性质

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摘要

A study of the magnetic and electrochemical properties of a TEMPO-substituted disulfide diradical in three different environments was carried out: in solution, in the crystal, and as a self-assembled monolayer (SAM) on an Au(111) substrate, and the relationship between them was explored. In solution, this flexible diradical shows a strong spin-exchange interaction between the two nitroxide functions that depends on the temperature and solvent. Structural, dynamic, and thermodynamic information has been extracted from the EPR spectra of this dinitroxide. The magnetic interactions in the crystal include intra- and intermolecular contributions, which have been studied separately and shown to be antiferromagnetic in both cases. Finally, we demonstrate that both the magnetic and electrochemical properties are preserved upon chemisorption of the diradical on a gold surface. The resulting SAM displayed anisotropic magnetic properties, and angle-resolved EPR spectra of the monocrystal allowed a rough determination of the orientation of the molecules in the SAM.
机译：研究了在三种不同环境中TEMPO取代的二硫化物双自由基的磁性和电化学性质：在溶液中，在晶体中以及作为Au（111）基底上的自组装单层（SAM），以及他们之间的关系进行了探讨。在溶液中，这种灵活的双自由基表现出取决于温度和溶剂的两个氮氧化物官能团之间强烈的自旋交换相互作用。结构，动态和热力学信息已从该二硝基氧的EPR光谱中提取。晶体中的磁性相互作用包括分子内和分子间的作用，这已经被单独研究并且在两种情况下都显示出反铁磁性。最后，我们证明了在金表面上双自由基的化学吸附后，磁性和电化学性质均得以保留。所得的SAM显示出各向异性的磁性，单晶的角度分辨EPR光谱可以粗略确定SAM中分子的取向。

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