Mapping the Sequential Self-Assembly of Heterometallic Clusters: From a Helix to a Grid
Mapping the Sequential Self-Assembly of Heterometallic Clusters: From a Helix to a Grid
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DOI：
10.1002/anie.201007388
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发表时间：
2011-01-01
影响因子：
16.6
通讯作者：
Oshio, Hiroki
中科院分区：
文献类型：
--
作者：
Newton, Graham N.;Onuki, Tatsuya;Oshio, Hiroki
The study of polynuclear transition-metal clusters is an area of great interest owing to the potential of such compounds to exhibit architecture-dependent behavior, such as molecular magnetism and host–guest and catalytic properties.[1, 2] One critical challenge is the multicomponent synthesis of nanoscale heterometallic cluster architectures, whereby different species with well-defined structures and physical properties can be isolated from one-pot solutions with a clear control parameter.[3]One of the key approaches to gain a measure of control over the self-assembly process is to utilize a ligand system that provides both rigidity (to minimize variability) and multidenticity (to ensure multiple metal centers are coordinated).[4] Polypyridyl ligands are an important group of compounds that meet these criteria and have been successfully used in a range of coordination clusters, such as in the elegant cage syntheses of Fujita et al.,[5] the [nn] grids of Lehn et al. and Thompson et al., amongst others,[6] and in the synthesis of molecular wires.[7] The specific arrangement of ions in these materials can induce multistabilities owing to spin-crossover [8] and mixed valency,[6c] and magnetic properties, such as singlemolecule magnetism [6b] and quantum magnetic oscillation.[9] The synthesis of regular heterometallic arrays is an area of intense research, as the inclusion of different metals in a cluster can lead to drastic changes in the physical properties, such as the spin ground state and redox activity, through the alteration of the overall magnetic and electronic interactions.[10]
