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Salen‐Type Triple‐Decker Trinuclear Dy 3 Complexes Showing Slow Magnetic Relaxation Behavior
Author(s) -
Yang Fan,
Yan Pengfei,
Li Quan,
Chen Peng,
Li Guangming
Publication year - 2012
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.201200357
Subject(s) - chemistry , crystallography , antiferromagnetism , ligand (biochemistry) , magnetic relaxation , dysprosium , relaxation (psychology) , molecule , ferromagnetism , ion , stereochemistry , magnetization , inorganic chemistry , condensed matter physics , social psychology , psychology , biochemistry , physics , receptor , organic chemistry , quantum mechanics , magnetic field
Two new Dy 3 sandwich complexes, namely, [Dy 3 L a 3 (CH 3 OH) 2 (NO 3 ) 3 ] · CH 2 Cl 2 · CH 3 OH · 2H 2 O [ 1 , H 2 L a = N , N ′‐bis(salicylidene)‐1,2‐phenylenediamine] and [Dy 3 L b 3 (OAc) 3 ] · 3CH 3 OH · H 2 O [ 2 , H 2 L b = N , N ′‐bis(3‐methoxysalicylidene)‐1,2‐phenylenediamine], have been synthesized from the reactions of a tetradentate salen‐type ligand (H 2 L a ) with Dy(NO) 3 · 6H 2 O and a hexadentate salen‐type ligand (H 2 L b ) with Dy(OAc) 3 · 6H 2 O. X‐ray crystallographic analysis reveals that both 1 and 2 have a similar new triple‐decker trinuclear sandwich structure. Magnetic studies indicate that 1 exhibits an antiferromagnetic interaction between the Dy 3+ ions, whereas 2 exhibits a ferromagnetic interaction between spin carriers. Although both 1 and 2 display slow magnetic relaxation behavior, two relaxation processes were observed in 2 , which expand on the recent reports of pure 4f‐type single molecule magnets (SMMs).