TY - JOUR
T1 - An oxide-bridged Dy–ReV–Dy single-molecule magnet
AU - Pedersen, Kasper Steen
AU - Dreiser, Jan
AU - Schau-Magnussen, Magnus
AU - Thuesen, Christian Aagaard
AU - Weihe, Høgni
AU - Bendix, Jesper
PY - 2012/10/9
Y1 - 2012/10/9
N2 - The reaction of diamagnetic trans-[Re V(O) 2(py) 4]NO 3 with [Ln(hfac) 3(H 2O) 2] (Ln = Dy, Y, Tb; hfac - = 1,1,1,5,5,5- hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac) 3(H 2O)-Re(O) 2(py) 4-Ln(hfac) 3(NO 3)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ″) signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy 3+ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.
AB - The reaction of diamagnetic trans-[Re V(O) 2(py) 4]NO 3 with [Ln(hfac) 3(H 2O) 2] (Ln = Dy, Y, Tb; hfac - = 1,1,1,5,5,5- hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac) 3(H 2O)-Re(O) 2(py) 4-Ln(hfac) 3(NO 3)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ″) signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy 3+ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.
U2 - 10.1016/j.poly.2012.08.022
DO - 10.1016/j.poly.2012.08.022
M3 - Journal article
SN - 0277-5387
VL - 46
SP - 47
EP - 52
JO - Polyhedron
JF - Polyhedron
IS - 1
ER -