Probing the influence of molecular symmetry on the magnetic anisotropy of octahedral cobalt(II) complexes,Inorganic Chemistry Frontiers

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Probing the influence of molecular symmetry on the magnetic anisotropy of octahedral cobalt(II) complexes
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-09-27 00:00:00 , DOI: 10.1039/c7qi00547d
Zhong-Yu Ding _{1,

2,

3,

4} , Yin-Shan Meng _{5,

6,

7,

8,

9} , Yi Xiao _{1,

2,

3,

4} , Yi-Quan Zhang _{4,

10,

11,

12,

13} , Yuan-Yuan Zhu _{1,

2,

3,

4,

14} , Song Gao _{5,

6,

7,

8,

9}

Affiliation

We herein report on the synthetic, structural, magnetic, and computational studies of six air-stable mononuclear Co(II) complexes with distorted octahedral geometry from PyBox type ligands. Magnetic and theoretical studies reveal that these complexes all exhibit field-induced type single-molecule magnet behaviour and a large energy splitting between the ground and first excited Kramers doublets. Dynamic magnetic property analysis shows that the Raman relaxation process is the predominant process in all six compounds. For complexes 1, 2, 3, 5, and 6, the contribution of the direct process also existed. Importantly, the axial zero-field splitting parameter D in this series varies from positive to negative with the increased distortion of the octahedral geometry for the Co(II) center, indicating that the fine-tuning of the molecular symmetry is an effective approach to manipulate the magnetic anisotropy in SIMs.

中文翻译：

探究分子对称性对八面体钴（II）配合物磁各向异性的影响

我们在此报告了从PyBox型配体产生的具有扭曲的八面体几何形状的六种空气稳定的单核Co（II）配合物的合成，结构，磁性和计算研究。磁性和理论研究表明，这些配合物均表现出场致型单分子磁体行为，并且在地面与初次激发的Kramers双峰之间具有较大的能量分裂。动态磁性能分析表明，在所有六个化合物中，拉曼弛豫过程是主要过程。为复合物1，2，3，5，和6，直接法的贡献也存在。重要的是，轴向零场分裂参数D随着Co（II）中心八面体几何形状畸变的增加，该序列从正到负变化，这表明分子对称性的微调是操纵SIM中磁各向异性的有效方法。

更新日期：2017-11-08

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