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Visible‐Light‐Driven Hydrogen Evolution Using Planarized Conjugated Polymer Photocatalysts

2015; Wiley; Volume: 55; Issue: 5 Linguagem: Inglês

10.1002/anie.201510542

1521-3773

Reiner Sebastian Sprick, Baltasar Bonillo, Rob Clowes, Pierre Guiglion, Nick J. Brownbill, Benjamin J. Slater, Frédéric Blanc, Martijn A. Zwijnenburg, Dave J. Adams, Andrew I. Cooper,

Luminescence and Fluorescent Materials

Linear poly(p-phenylene)s are modestly active UV photocatalysts for hydrogen production in the presence of a sacrificial electron donor. Introduction of planarized fluorene, carbazole, dibenzo[b,d]thiophene or dibenzo[b,d]thiophene sulfone units greatly enhances the H2 evolution rate. The most active dibenzo[b,d]thiophene sulfone co-polymer has a UV photocatalytic activity that rivals TiO2, but is much more active under visible light. The dibenzo[b,d]thiophene sulfone co-polymer has an apparent quantum yield of 2.3 % at 420 nm, as compared to 0.1 % for platinized commercial pristine carbon nitride.Großer Schub für die H2‐Produktion: Die Einführung von planarisierten Fluoren‐, Carbazol‐, Dibenzo[b,d]thiophen‐ oder Dibenzo[b,d]thiophensulfon‐Einheiten in lineare Poly(p‐phenylene) führt zu einer drastisch erhöhten Aktivität in der durch Licht vermittelten Wasserstoffentwicklung. Das aktivste Copolymer, dasjenige mit Dibenzo[b,d]thiophensulfon, erreicht die UV‐Aktivität von TiO2, ist aber deutlich aktiver unter sichtbarem Licht.