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Synthesis, Structures, and Magnetic Properties of Three Series of Discrete or 1D Compounds based on Pyramidal [ Ln Cu 4 ] ( Ln = Gd and Dy) Cluster and Formate Ligand
Author(s) -
Li ZhongYi,
Zhang JianJun,
Zhang FuQiang,
Cao GuangXiu,
Zhai Bin
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400433
Subject(s) - formate , crystallography , ligand (biochemistry) , square pyramidal molecular geometry , magnetization , chemistry , perchlorate , cluster (spacecraft) , macrocyclic ligand , formula unit , ferromagnetism , crystal structure , stereochemistry , ion , physics , biochemistry , receptor , organic chemistry , quantum mechanics , magnetic field , computer science , programming language , catalysis
With formate as ligand, one discrete dragonfly‐like 3d–4f cluster showing beautiful pyramidal metal skeleton, [GdCu 4 (HCOO) 5 (μ 3 ‐OH) 4 (NO 3 ) 2 (H 2 O) 7 ](H 2 O) ( 1Gd ), was obtained by a self‐assembly reaction of Gd(NO 3 ) 3 , Cu(NO 3 ) 2 , and formate ligand. The two nitrates could be treated as the “wings” of the “dragonfly”, and the formate with a free oxygen atom could be regarded as the “tail”. When using perchlorate instead of nitrate, two series of 1D compounds based on the similar pyramidal [ Ln Cu 4 ] unit, linear {[GdCu 4 (HCOO) 5 (μ 3 ‐[OH) 4 (H 2 O) 8 ](ClO 4 ) 2 (H 2 O) 2 } n ( 2Gd ) and zigzag {[ Ln Cu 4 Na 2 (HCOO) 4 (μ 3 ‐OH) 4 (H 2 O) 9 (ClO 4 ) 5 ](H 2 O) 2 } n [ Ln = Gd, ( 3Gd ); Dy, ( 3Dy )] were synthesized by controlling the formate amount. They used μ 5 ‐η 1 :η 4 formate or [Na 2 (ClO 4 ) 4 ] 2– unit as connectors to link the neighboring [ Ln Cu 4 ] units together, respectively. Magnetic analyses reveal that these four compounds all show ferromagnetic interactions, and 3Dy displays slow relaxation of the magnetization.