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Phosghonate ligands stabilize mixed-valent (MnIII20-xMnIIx} clusters with large spin and coercivity

被引：227
作者：
Maheswaran, S
Chastanet, G
Teat, SJ
Mallah, T
Sessoli, R
Wernsdorfer, W
Winpenny, REP
机构：
[1] Univ Florence, Dipartimento Chim, Lab Magnetismo Mol, I-50019 Sesto Fiorentino, Italy
[2] INSTM, I-50019 Sesto Fiorentino, Italy
[3] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England
[4] CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England
[5] Univ Paris 11, CNRS, UMR 8613, Chim Inorgan Lab, F-91405 Orsay, France
[6] CNRS, Lab Louis Neel, F-38042 Grenoble, France
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2005年 / 44卷 / 32期
关键词：
cluster compounds; magnetic properties; manganese; molecular magnets; spin crossover;
D O I：
10.1002/anie.200501265
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In a spin: The mixed-valent (MnIII20-xM-Mn IIx} cage complexes (x = 2-6) have structures corresponding to a fragment of a cubic close-packed lattice (see picture, Mn large sphere, O small sphere). Magnetic studies show for the cage with x = 2 that the ground state has a spin (S) of 19 ± 1 in low field, which increases to about S = 30 at higher fields. The cage is a (Chemical Equation Presented) single molecule magnet" with a high energy barrier (43 K) to reorientation of the magnetization. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA."
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页码：5044 / 5048
页数：5
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