Lanthanoid 鈥淏ottlebrush鈥?Clusters: Remarkably Elongated Metal鈥揙xo Core Structures with Controllable Lengths

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• 作者：Daniel D鈥橝lessio ; Alexandre N. Sobolev ; Brian W. Skelton ; Rebecca O. Fuller ; Robert C. Woodward ; Nigel A. Lengkeek ; Benjamin H. Fraser ; Massimiliano Massi ; Mark I. Ogden
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：October 29, 2014
• 年：2014
• 卷：136
• 期：43
• 页码：15122-15125
• 全文大小：311K
• ISSN：1520-5126

文摘

Large metal鈥搊xo clusters consistently assume spherical or regular polyhedral morphologies rather than high-aspect-ratio structures. Access to elongated core structures has now been achieved by the reaction of lanthanoid salts with a tetrazole-functionalized calixarene in the presence of a simple carboxylate co-ligand. The resulting Ln₁₉ and Ln₁₂ clusters are constructed from apex-fused Ln₅O₆ trigonal bipyramids and are formed consistently under a range of reaction conditions and reagent ratios. Altering the carboxylate co-ligand structure reliably controls the cluster length, giving access to a new class of rod-like clusters of variable length.