Premium
Local Geometry Symmetry and Electrostatic Distribution Dominated Eight‐Coordinate β‐Diketone Dy III SIMs
Author(s) -
Yao Xu,
Yan Pengfei,
An Guanghui,
Li Yuxin,
Li Weizuo,
Li Guangming
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900006
Subject(s) - chemistry , coordination geometry , crystallography , geometry , ion , coordination sphere , magnetism , magnetic anisotropy , anisotropy , relaxation (psychology) , magnetic relaxation , lanthanide , crystal structure , magnetization , magnetic field , condensed matter physics , hydrogen bond , molecule , physics , quantum mechanics , psychology , social psychology , mathematics , organic chemistry
To further explore the correlation among the relaxation dynamics, geometry symmetry and ligand field of Dy III SIMs, three β‐diketone mononuclear Dy III complexes, formulating as [Dy(thd) 2 (NO 3 )(TPPO) 2 ] ( 1 ), [Dy(tfa) 2 (NO 3 )(TPPO) 2 ] ( 2 ) and [Dy(thd) 3 (4‐Py) 2 ] ( 3 ) (thd = 2,2,6,6‐tetramethyl‐3,5‐heptanedione, tfa = trifluoroacetylacetonate, Tppo = Triphenylphosphane oxide and 4‐Py = 4‐methylpyridine) have been synthesized. Single‐crystal X‐ray diffractions reveal that complexes 1 – 3 are all eight‐coordinated mononuclear structures with D 2d , C 2 v and D 4d local symmetry, respectively. Magnetic analysis reveals that all complexes 1–3 exhibit field‐induced single‐ion magnets (SIMs) behavior resulted from the mixed eigenstates of ground state doublets. The differences in the results of energy barrier indicate that the local geometry symmetry and electrostatic distribution of Dy III ions dominate the magnetic property. Furthermore, the relationship between the structure and magnetism of eight‐coordinated Dy III ions SIMs with the SAP N 2 O 6 coordination environment was also discussed via correlation between the anisotropy axis and coordinating geometry symmetry.