Lanthanide Template Synthesis of a Molecular Trefoil Knot

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• 作者：Jean-Fran莽ois Ayme ; Guzm谩n Gil-Ram铆rez ; David A. Leigh ; Jean-Fran莽ois Lemonnier ; Augustinas Markevicius ; Christopher A. Muryn ; Gen Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：September 24, 2014
• 年：2014
• 卷：136
• 期：38
• 页码：13142-13145
• 全文大小：359K
• ISSN：1520-5126

文摘

We report on a complex featuring three 2,6-pyridinedicarboxamide ligands entwined around a lanthanide (Ln³⁺) ion. The ligand strands can be cyclized by ring-closing olefin metathesis to form a molecular trefoil knot in 58% yield. Demetalation with tetraethylammonium fluoride quantitatively generates the wholly organic 81-atom-loop trefoil knot.