Heterometallic cubane single-molecule magnets.
Two new heterometallic cubane molecules have been synthesized. High-frequency electron paramagnetic resonance and magnetization measurements indicate that [Mn(3)Ni(hmp)(3)O(N(3))(3)(C(7)H(5)O(2))(3)] (1) displays a well-isolated S = 5 ground state (DeltaE > 120 K), with g = 2.0, D = -0.23 cm(-1), and ferromagnetic Mn-Mn exchange interactions competing with antiferromagnetic Ni-Mn interactions. [Mn(3)Zn(hmp)(3)O(N(3))(3)(C(3)H(5)O(2))(3)] (2) possesses a S = 6 ground state (DeltaE > 105 K), with g = 2.0, D = -0.14 cm(-1), and ferromagnetic Mn-Mn exchange interactions. Magnetization vs magnetic field data for oriented single crystals of 1 and 2 indicate that both complexes are single-molecule magnets.
Feng
Patrick L
PL
Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, USA.
Beedle
Christopher C
CC
Wernsdorfer
Wolfgang
W
Koo
Changhyun
C
Nakano
Motohiro
M
Hill
Stephen
S
Hendrickson
David N
DN