INOR 78 |
| Two families of polynuclear 3d metal complexes have attracted particular interest in recent years, single-strand molecular wheels and closed, cage-like molecular clusters. Both families include complexes of high nuclearity and architectural beauty that have long fascinated chemists with their aesthetically pleasing structures and their often interesting properties. Molecular wheels of paramagnetic metal ions almost always contain an even number of metal centers that are antiferromagnetically coupled, and they represent ideal model systems for the study of one-dimensional magnetism, magnetic anisotropy, and quantum effects such as coherent tunneling of the Néel vector. Polynuclear 3d metal clusters are also of great interest for a variety of reasons, not least of which are their contributions within the field of single-molecule magnets (SMMs); this is the ability of molecular species with a large spin (S) and a negative zero-field splitting parameter (D) to function as nanoscale magnetic materials. Such SMMs represent a ‘bottom-up' approach to nanomagnetism and straddle the classical/quantum interface; they display both classical hysteresis and quantum tunneling of magnetization. This talk will describe some of our recent progress in these two areas: (i) new synthetic routes to molecular wheels, including development of some level of control of the wheel size; and (ii) new high spin S molecules and SMMs, and development of targeted methods to modify their magnetic properties. |
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Young Investigator Symposium
1:30 PM-5:30 PM, Sunday, August 19, 2007 BCEC -- 206 A/B, Oral
Division of Inorganic Chemistry |