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- Title
Thieno-Fused Subporphyrazines: A New Class of Light Harvesters.
- Authors
Gotfredsen, Henrik; Storm, Freja Eilsø; Muñoz, Alberto Viñas; Santella, Marco; Kadziola, Anders; Hammerich, Ole; Mikkelsen, Kurt V.; Nielsen, Mogens Brøndsted
- Abstract
Boron subphthalocyanines comprised of three isoindole units bridged by aza-linkages are attractive light harvesters on account of their intense low-energy absorptions. Herein, we present a class of related compounds, in which one or two isoindole units are substituted for thieno[3,4- c]pyrrole units - thieno-fused subporphyrazines. Such changes have remarkable consequences for the optical properties, as was revealed by combined experimental and theoretical studies. Thus, we find that the lowest-energy absorptions cover a much broader region with a significantly redshifted end-absorption and without compromising the absorption intensities. Thieno-fused subporphyrazines also underwent more readily oxidation and reduction, indicating an increased HOMO energy and decreased LUMO energy. In addition, they were found to readily co-crystallize with Buckminsterfullerene, C60. Altogether, these findings render this new class of chromophores attractive candidates for light-harvesting applications.
- Subjects
PORPHYRAZINES; ISOINDOLE; LIGHT absorption; ENERGY harvesting; CHROMOPHORES; THIOPHENES
- Publication
Chemistry - A European Journal, 2017, Vol 23, Issue 64, p16194
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201704551