调节三角双锥钴（II）配合物中的伊辛型各向异性
Tuning the Ising-type anisotropy in trigonal bipyramidal Co(II) complexes.
作者信息
Shao Feng, Cahier Benjamin, Guihéry Nathalie, Rivière Eric, Guillot Régis, Barra Anne-Laure, Lan Yanhua, Wernsdorfer Wolfgang, Campbell Victoria E, Mallah Talal
机构信息
Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay Cedex, France.
Laboratoire de Chimie et Physique Quantiques, Université de Toulouse III, 118 route de Narbonne, 31062 Toulouse, France.
出版信息
Chem Commun (Camb). 2015 Nov 28;51(92):16475-8. doi: 10.1039/c5cc07741a.
This paper demonstrates the engineering and tuning of Ising-type magnetic anisotropy in trigonal bipyramidal Co(II) complexes. Here, we predict that employing a ligand that forces a trigonal bipyramidal arrangement and has weak equatorial σ-donating atoms, increases (in absolute value) the negative zero field splitting parameter D. With these considerations in mind, we used a sulfur containing ligand (NS3(iPr)), which imposes a trigonal bipyramidal geometry to the central Co(II) ion with long equatorial Co-S bonds. The resulting complex exhibits a larger anisotropy barrier and a longer relaxation time in comparison to the complex prepared with a nitrogen containing ligand (Me6tren).
本文展示了三角双锥Co(II)配合物中伊辛型磁各向异性的工程设计与调控。在此，我们预测，使用一种能促使形成三角双锥排列且具有弱赤道面σ供体原子的配体，会增大（绝对值）负零场分裂参数D。基于这些考虑，我们使用了一种含硫配体（NS3(iPr)），它使中心Co(II)离子具有三角双锥几何构型且赤道面Co-S键较长。与用含氮配体（Me6tren）制备的配合物相比，所得配合物表现出更大的各向异性势垒和更长的弛豫时间。
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