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{[Ln(hfac) 3 ] 2 [Cu(hfac) 2 ] 3 (NIT‐Pyrim) 2 (H 2 O) 2 } (Ln III = Gd, Ho, Er): Unique Nitronyl Nitroxide Bridged 3d–4f Heterometallic Clusters
Author(s) -
Li Cun,
Li Hongdao,
Xie Jing,
Yang Meng,
Wang Xiufeng,
Li Licun
Publication year - 2018
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.201700576
Subject(s) - chemistry , radical , magnetism , crystallography , ferromagnetism , magnetic relaxation , nitroxide mediated radical polymerization , cluster (spacecraft) , ion , oxide , relaxation (psychology) , magnetization , condensed matter physics , magnetic field , physics , polymerization , psychology , social psychology , radical polymerization , organic chemistry , quantum mechanics , computer science , programming language , polymer
A series of novel 3d–4f heterometallic complexes involving pyrimidine‐substituted nitronyl nitroxide radicals with the formula {[Ln(hfac) 3 ] 2 [Cu(hfac) 2 ] 3 (NIT‐Pyrim) 2 (H 2 O) 2 } [Ln III = Gd ( 1 ), Ho ( 2 ), Er ( 3 ); NIT‐Pyrim = 2‐(5‐pyrimidinyl)‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide] have been isolated and characterized in terms of structure and magnetism. These 2p–3d–4f compounds consist of Cu II 3 Ln III 2 pentanuclear clusters in which two NIT‐Pyrim radicals act as µ 3 bridges. All compounds display ferromagnetic interactions between the radicals and metal ions. Slow magnetic relaxation was observed in the Ho complex, which represents the first example of a radical–Ho cluster exhibiting magnetic relaxation behavior.