Investigation of magneto-structural correlation based on a series of seven-coordinated β-diketone Dy(iii) single-ion magnets with C2v and C3v local symmetry

Dalton Transactions : an International Journal of Inorganic Chemistry
Xu YaoGuangming Li

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.

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Citations

Nov 28, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Guo PengGeorge E Kostakis
Jan 11, 2019·Chemistry, an Asian Journal·Yu GeBao-Lin Wang
Oct 8, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Fu-Xing ShenAnangamohan Panja

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Methods Mentioned

BETA
X-ray

Software Mentioned

Magellan
SHELXTL
PHI

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