title: Synthesis of Five-Porphyrin Nanorings by Using Ferrocene and Corannulene Templates.
abstract: The smallest and most strained member of a family of π-conjugated cyclic porphyrin oligomers was synthesized by using pentapyridyl templates based on ferrocene and corannulene. Both templates are effective for directing the synthesis of the butadiyne-linked cyclic pentamer, despite the fact that the radii of their N5 donor sets are too small by 0.5 Å and 0.9 Å, respectively (from DFT calculations). The five-porphyrin nanoring exhibits a structured absorption spectrum and its fluorescence extends to 1200 nm, reflecting strong π conjugation and Herzberg-Teller vibronic coupling.
authors.affiliation: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, OX1 3TA, UK.
authors.forename: Pengpeng
authors.initials: P
authors.lastname: Liu
authors.affiliation: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, OX1 3TA, UK.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Hisamune
authors.affiliation: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, OX1 3TA, UK.
authors.forename: Martin D
authors.initials: MD
authors.lastname: Peeks
authors.affiliation: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, OX1 3TA, UK.
authors.forename: Barbara
authors.initials: B
authors.lastname: Odell
authors.affiliation: Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK.
authors.forename: Juliane Q
authors.initials: JQ
authors.lastname: Gong
authors.affiliation: Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK.
authors.forename: Laura M
authors.initials: LM
authors.lastname: Herz
authors.affiliation: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, OX1 3TA, UK. harry.anderson@chem.ox.ac.uk.
authors.forename: Harry L
authors.identifier: 0000-0002-1801-8132
authors.initials: HL
authors.lastname: Anderson
keywords: corannulene derivatives; ferrocene derivatives; macrocycles; strained rings; templated synthesis