期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 299, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2021.122209
关键词
Co(II) ion; Magnetic anisotropy; Zero-field; Slow magnetic relaxation
资金
- Nantong University Analytical Testing Center
- National Natural Science Foundation of China [21776140]
- Science and Technology Projects Fund of Nantong City [JC2020134, JC2020133]
By synthesizing a mononuclear tetrahedral Co(II) complex, this study demonstrates the method of modulating the coordination environment by varying substitution on the ligand. Magnetic studies reveal that the acute N-Co-N bite angle can influence the magnetic anisotropy of tetrahedral Co(II) complexes.
By modulating the substitution on the oxamide ligand, a mononuclear tetrahedral Co(II) complex (HNEt3)(2)[CoL2] (1) (H2L = N,N'-bis(methanesulfonyl)oxamide) with subtle variation in the CoN4 coordination environment was successfully synthesized, which displays zero-field slow magnetic relaxation and a hysteresis loop at 1.8 K. The complex adopts distorted tetrahedral coordination geometries with acute N-Co-N bite angle imposed by two mutually perpendicular oxamide ligands. Magnetic studies and computational results reveal that the acute N-Co-N bite angle seems to govern the overall magnetic anisotropy of tetrahedral Co(II) complexes with two bidentate chelated ligands containing N-4-donor set. Upon reducing the bite angle, the D parameter increases gradually and reaches the maximum at about 81 degrees, and then show a significant decrease as the angle continuing to decline. This research demonstrates that the easy-axial magnetic anisotropy can be maximized by reducing the bite angle to a certain extent, which is also feasible for tetrahedral cases with other donor sets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据