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Directed assembly of metal-cyanide cluster magnets
被引:439
作者:
Beltran, LMC
[1
]
Long, JR
[1
]
机构:
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词:
D O I:
10.1021/ar040158e
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The simple, well-understood coordination chemistry of the cyanide ligand is of significant utility in the design of new single-molecule magnets. Its preference for bridging two transition metals in a linear M'-CN-M geometry permits the use of multidentate blocking ligands in directing the assembly of specific molecular architectures. This approach has been employed in the synthesis of numerous high-nuclearity constructs, including simple cubic M4M'(4)(CN)(12) and face-centered cubic M8M'(6)(CN)(24) coordination clusters, as well as some unexpected cluster geometries featuring as many as 27 metal centers. The ability to substitute a range of different transition metal ions into these structures enables adjustment of their magnetic properties, facilitating creation of high-spin ground states with axial magnetic anisotropy. To date, at least four different cyano-bridged single-molecule magnets have been characterized, exhibiting spin-reversal barriers as high as 25 cm(-1). Ultimately, it is envisioned that this strategy might lead to molecules possessing much larger barriers with the potential for storing information at more practical temperatures.
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页码:325 / 334
页数:10
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