title: Lanthanide template synthesis of a molecular trefoil knot.
abstract: We report on a complex featuring three 2,6-pyridinedicarboxamide ligands entwined around a lanthanide (Ln(3+)) 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.
authors.affiliation: School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Ayme
authors.forename: Guzmán
authors.initials: G
authors.lastname: Gil-Ramírez
authors.forename: David A
authors.initials: DA
authors.lastname: Leigh
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Lemonnier
authors.forename: Augustinas
authors.initials: A
authors.lastname: Markevicius
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Muryn
authors.forename: Gen
authors.initials: G
authors.lastname: Zhang
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D000577:Amides / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D003500:Cyclization; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D011725:Pyridines / Q000737:chemistry*
chemical_list: D000475:Alkenes; D000577:Amides; D002412:Cations; D028581:Lanthanoid Series Elements; D008024:Ligands; D011725:Pyridines