{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Majewski MA"],"funding":["European Research Council","Royal Society","H2020 Marie Skłodowska-Curie Actions","Engineering and Physical Sciences Research Council"],"pagination":["e202302114"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10947019"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["62(18)"],"pubmed_abstract":["Rings of porphyrins mimic natural light-harvesting chlorophyll arrays and offer insights into electronic delocalization, providing a motivation for creating larger nanorings with closely spaced porphyrin units. Here, we demonstrate the first synthesis of a macrocycle consisting entirely of 5,15-linked porphyrins. This porphyrin octadecamer was constructed using a covalent six-armed template, made by cobalt-catalyzed cyclotrimerization of an H-shaped tolan with porphyrin trimer ends. The porphyrins around the circumference of the nanoring were linked together by intramolecular oxidative meso-meso coupling and partial β-β fusion, to give a nanoring consisting of six edge-fused zinc(II) porphyrin dimer units and six un-fused nickel(II) porphyrins. STM imaging on a gold surface confirms the size and shape of the spoked 18-porphyrin nanoring (calculated diameter: 4.7 nm)."],"journal":["Angewandte Chemie (International ed. in English)"],"pubmed_title":["Covalent Template-Directed Synthesis of a Spoked 18-Porphyrin Nanoring."],"pmcid":["PMC10947019"],"funding_grant_id":["839418","EP/N017188/1","885606"],"pubmed_authors":["Anderson HL","Van Raden JM","Majewski MA","Hart J","Saywell A","Stawski W","O'Shea JN","Clarke M"],"additional_accession":[]},"is_claimable":false,"name":"Covalent Template-Directed Synthesis of a Spoked 18-Porphyrin Nanoring.","description":"Rings of porphyrins mimic natural light-harvesting chlorophyll arrays and offer insights into electronic delocalization, providing a motivation for creating larger nanorings with closely spaced porphyrin units. Here, we demonstrate the first synthesis of a macrocycle consisting entirely of 5,15-linked porphyrins. This porphyrin octadecamer was constructed using a covalent six-armed template, made by cobalt-catalyzed cyclotrimerization of an H-shaped tolan with porphyrin trimer ends. The porphyrins around the circumference of the nanoring were linked together by intramolecular oxidative meso-meso coupling and partial β-β fusion, to give a nanoring consisting of six edge-fused zinc(II) porphyrin dimer units and six un-fused nickel(II) porphyrins. STM imaging on a gold surface confirms the size and shape of the spoked 18-porphyrin nanoring (calculated diameter: 4.7 nm).","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 Apr","modification":"2025-05-18T12:53:49.388Z","creation":"2025-05-18T12:53:49.388Z"},"accession":"S-EPMC10947019","cross_references":{"pubmed":["36877745"],"doi":["10.1002/anie.202302114"]}}