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Investigation of Magneto-Structural Correlation Based on a Series of Seven-Coordinated β-diketone Dy(iii) Single-Ion Magnets With C

Investigation of Magneto-Structural Correlation Based on a Series of Seven-Coordinated β-diketone Dy(iii) Single-Ion Magnets With C

Xu Yao, Pengfei Yan, Guanghui An, Yuxin Li, Weizuo Li, Guangming Li

Dalton Trans. 2018 Mar 12;47(11):3976-3984.

PMID: 29464244

Abstract:

A series of four β-diketone mononuclear Dy(iii) complexes, namely Dy(Hthd)3(MeOH)·2,5-Py (1), Dy(Hthd)3(Tppo) (2), Dy(Hthd)3(PyNO) (3), and Dy(Hthd)3(4-PyNO) (4) (Hthd = 2,2,6,6-tetramethyl-3,5-heptanedione, 2,5-Py = 2,5-pyridine, Tppo = triphenylphosphine oxide, PyNO = pyridine N-oxide, 4-PyNO = 4-methylpyridine N-oxide), have been isolated by reactions of Hthd, DyCl3·6H2O and an auxiliary ligand. X-ray crystallographic analysis revealed that complexes 1-4 are all seven-coordinated mononuclear structures with C2v or C3v local symmetry. The magnetic measurements of complexes 1-4 revealed their field-induced single-ion magnet (SIM) behavior, due to mixed low-lying states. The crystal field parameters and orientations of the magnetic easy axes were obtained from simulations of the DC magnetic data and an electrostatic model calculation. The magneto-structural correlation of seven-coordinated Dy(iii) SIMs with low-symmetry coordination environments was further discussed.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1118714	2,2,6,6-Tetramethyl-3,5-heptanedione		1118-71-4	Price

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