Heterometallic hexanuclear Ni4M2 (M = Dy, Y) complexes: structure and single-molecule magnet for the Dy(iii) derivative. Issue 6 (22nd January 2018) - Pei, Shaomin
Abstract : We report here a 3d–4f heterometallic hexanuclear Ni4 Dy2 single-molecule magnet with an S-shaped double-pocket skeleton. Abstract : To achieve a heterometallic single-molecule magnet with novel topologies, two isostructural hexanuclear clusters [Ni4 Ln2 (μ3 -OH)2 L4 (OAc)8 ]·H2 O [Ln = Dy, 1 ; Y, 2 ] were prepared from the reactions of 1, 3-diamine-2-propanol (HL) with MCl3 ·6H2 O (M = Dy, Y) and Ni(OAc)2 ·4H2 O in acetonitrile, in which the studies for2 with the diamagnetic metal ion of Y(iii ) are just for further understanding of the magnetic properties of1 . Single-crystal X-ray diffraction measurements indicate that both heterometallic hexanuclear complexes possess an S-shaped double-pocket skeleton with the two M(iii ) ions separated by a chair-like Ni4 O4 moiety. The temperature- and frequency-dependent alternating-current (ac) susceptibility measurements under zero dc fields revealed a single-molecule magnet for1 . Its magnetic properties can be further understood based on the magnetic analysis of2 .