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Single‐Molecule Magnet and Magnetothermal Properties of Two‐Dimensional Polymers Containing Heterometallic [Cu 5 Ln 2 ] (Ln = Gd III and Dy III ) Motifs
Author(s) -
Dey Atanu,
Das Sourav,
Palacios María A.,
Colacio Enrique,
Chandrasekhar Vadapalli
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.201701429
Subject(s) - chemistry , crystallography , magnetic refrigeration , single molecule magnet , molecule , lanthanide , polymer , ligand (biochemistry) , magnet , magnetic susceptibility , stereochemistry , magnetization , magnetic field , ion , physics , biochemistry , receptor , organic chemistry , quantum mechanics
The reaction of a compartmental ligand N , N′ ‐bis(3‐methoxysalicylidene)‐1,3‐diamino‐2‐propanol (LH 3 ) with Cu II and Ln III salts under solvothermal conditions afforded two‐dimensional coordination polymers, [{Cu 5 Gd 2 (L) 2 (µ 3 ‐OH) 4 (NO 3 ) 4 (µ‐OH 2 ) 2 }(NO 3 ) 2 ] ∞ ( 1 ) and [{Cu 5 Dy 2 (L) 2 (µ 3 ‐OH) 4 (NO 3 ) 4 (MeOH) 2 }(NO 3 ) 2 ] ∞ ( 2 ). A detailed study of the magnetic properties of the two coordination polymers reveals that the [Cu 5 Dy 2 ] analogue shows single‐molecule magnet (SMM) behavior with an energy barrier of about 12 K with τ 0 = 10 –6 s under zero‐dc field, while the [Cu 5 Gd 2 ] analogue shows magnetocaloric effect with a –Δ S m value of 17.55 J kg –1 K –1 at T = 2 K (Δ B = 5 T). Interestingly, the magnetic and SMM properties of the previously reported molecular and one‐dimensional analogues containing the [Cu 5 Ln 2 ] motif are preserved even in the two‐dimensional coordination networks.