Furan- and Thiophene-Based Auxochromes Red-shift Chlorin Absorptions and Enable Oxidative Chlorin Polymerizations
2017 (English)In: Chemsitry - An Europian Journal, ISSN 0947-6539, Vol. 23, 4089-4095 p.Article in journal (Refereed) Published
The de novo syntheses of chemically stable chlorins with five-membered heterocyclic (furane, thiophene, formylfurane and formylthiophene) substituents in selected meso- and beta-positions are reported. Heterocycle incorporation in the 3- and 13-positions shifted the chlorin absorption and emission to the red (up to lambdaem =680 nm), thus these readily incorporated substituents function analogously to auxochromes present in chlorophylls, for example, formyl and vinyl groups. Photophysical, theoretical and X-ray crystallographic experiments revealed small but significant differences between the behavior of the furan- and the thiophene-based auxochromes. Four regioisomeric bis-thienylchlorins (3,10; 3,13, 3,15 and 10,15) were oxidatively electropolymerized; the chlorin monomer geometry had a profound impact on the polymerization efficiency and the electrochemical properties of the resulting material. Chemical co-polymerization of 3,13-bis-thienylchlorin with 3-hexylthiophene yielded an organic-soluble red-emitting polymer.
Place, publisher, year, edition, pages
2017. Vol. 23, 4089-4095 p.
Research subject Chemistry with specialization in Organic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-319902OAI: oai:DiVA.org:uu-319902DiVA: diva2:1087962
FunderSwedish Research Council, 2013-4655Swedish Research Council, 2013-4763Stiftelsen Olle Engkvist Byggmästare