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Structural and Magnetic Properties of 2p‐3d‐4f Hetero‐Tri‐Spin Chains Comprising [{Cu(hfac) 2 ‐Radical} 2 ] Dimers and Ln(hfac) 3 (hfac=hexafluoroacetylacetonate)
Author(s) -
Zhu Mei,
Yang Meng,
Wang Juanjuan,
Li Hongdao,
Li Licun
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600383
Subject(s) - dimer , crystallography , magnetization , chemistry , ferromagnetism , molecule , spin (aerodynamics) , ion , antiferromagnetism , relaxation (psychology) , oxide , stereochemistry , magnetic field , condensed matter physics , physics , organic chemistry , quantum mechanics , thermodynamics , psychology , social psychology
A new family of 2p‐3d‐4f hetero‐tri‐spin complexes [Ln(hfac) 3 {Cu(hfac) 2 (NIT‐3 PyPh)} 2 ] (Ln=Gd ( 1 ), Tb ( 2 ), Dy ( 3 ), Ho ( 4 ); NIT‐3 PyPh=2‐[4‐(3‐pyridinylmethoxy)phenyl]‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide; hfac=hexafluoroacetylacetonate) have been synthesized. Four complexes possess a 1D chain structure in which two radical ligands join two Cu(hfac) 2 molecules to form a [{Cu(hfac) 2 ‐rad)} 2 ] dimer cycle and the dimer rings are linked by Ln(hfac) 3 units. Magnetic studies show that ferromagnetic exchange couplings exist between the coordinated NO groups of radical ligands and metal ions. Field‐induced slow relaxation of the magnetization was observed in the Tb and Dy compounds.