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题名: Fine-Tuning Ligand to Modulate the Magnetic Anisotropy in a Carboxylate-Bridged Dy-2 Single-Molecule Magnet System
作者: Wang, Yu-Ling1; Han, Chang-Bao1; Zhang, Yi-Quan2; Liu, Qing-Yan1; Liu, Cai-Ming3; Yin, Shun-Gao1
刊名: INORGANIC CHEMISTRY
发表日期: 2016-06-06
卷: 55, 期:11, 页:5578-5584
收录类别: SCI
英文摘要: A series of dinuclear Dy(III) compounds with the general formula [Dy-2(mu(2)-anthc)(4)(anthc)(2)(L)(2)] (anthc(-) = 9-anthracenecarboxylate, L = 2,2'-bipyridyl (1), 1,10-phenanthroline (2), and 4,7-dimethy1-1,10-phenanthroline (3)) were synthesized and magnetically characterized. These compounds exhibit single-molecule magnet (SMM) behavior in the absence of the direct-current field, which is rarely observed for carboxylate-bridged dinuclear Dy-2 system. With the first coordination sphere of Dy(III) centers being fixed, the energy barrier was modulated by sequentially modifying the terminal neutral L ligands in this Dy-2 system. Theoretical calculations revealed that the symmetry of the charge distribution surrounding the Dy(III) centers in 1-3 is the decisive factor to determine the relaxation of the SMMs. The combination of the larger charge distribution along the magnetic axis and lower charge distribution in the equatorial plane (hard plane) formed by five coplanar coordination atoms including two N atoms provided by an L ligand led to a strong easy-axis ligand field in these compounds. This work presents a rational method to modulate the dynamic magnetic relaxation of the lanthanide SMMs through fine-tuning electrostatic potential of the atoms on the hard plane.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35771
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Jiangxi, Peoples R China
2.Nanjing Normal Univ, Sch Phys Sci & Technol, Jiangsu Key Lab NSLSCS, Nanjing 210023, Jiangsu, Peoples R China
3.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Ctr Mol Sci, Beijing 100190, Peoples R China
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