Light‐Harvesting Supramolecular Polymers: Energy Transfer to Various Polyaromatic Acceptors. Issue 30 (27th May 2020)

• Record Type: Journal Article
• Authors: Jevric, Jovana; Langenegger, Simon M.; Häner, Robert
• Is Part Of: European journal of organic chemistry. Issue 30(2020)
• Page Start: 4677
• Page End: 4680
• Publication Date: 2020-05-27
• Subjects: Energy transfer -- Light‐harvesting antenna -- Pi interactions -- Phosphodiester -- Supramolecular polymers; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; Bioorganic chemistry -- Periodicals; Chemistry, Physical organic -- Periodicals; 547
• DOI: 10.1002/ejoc.202000441
• Languages: English
• ISSNs: 1434-193X

Abstract

Abstract : A supramolecular light‐harvesting antenna consisting of 3, 6‐disubstituted phosphodiester‐linked phenanthrene trimers (donors) was doped with different charged and uncharged polyaromatic and heteroaromatic acceptor chromophores. Excitation of the phenanthrene moieties is followed by energy transfer to the acceptor molecules and radiative relaxation. The self‐assembled fiber structure of the phenanthrene trimers is not altered by the dopant, as verified by atomic force microscopy (AFM). Among several neutral and cationic acceptor chromophores, benzo(a)pyrene emerged as one of the highest fluorescence quantum yields, reaching 31 % at a chromophore/phenanthrene ratio of 12 mol‐%. The energy transfer is probably a combination of Förster resonance energy transfer (FRET) and a coherent energy transfer mechanism. Abstract : Supramolecular polymers formed from phosphodiester‐bridged phenanthrene trimers are doped with charged and uncharged acceptor chromophores. Excitation of the phenanthrenes is followed by efficient energy transfer to the acceptor molecules.